Pamela De La O joined MountainStar Sports Group in September 2013 and currently serves as Vice President of Finance & Administration. She oversees financial reporting, accounting, and administrative operations across MountainStar’s portfolio, including the El Paso Chihuahuas, El Paso Locomotive FC, Leg Up Entertainment, and the MountainStar Sports Group Foundation.

In her role, De La O leads financial strategy and compliance, ensuring adherence to Major League Baseball and United Soccer League reporting standards. She also oversees information technology initiatives, supports capital expenditures for stadium and facility operations, risk management, and administrative functions. Her leadership supports the financial integrity and operational efficiency of MountainStar’s diverse and evolving business ventures.

A native of El Paso, Texas, De La O began her career in public accounting with Lauterbach, Borschow & Company and prior to, Dunbar, Broaddus, Gibson, P.C. She earned a Bachelor of Business Administration in Accounting from The University of Texas at El Paso in 2000 and became a Certified Public Accountant in 2008.

She and her husband, Frank, have one daughter, Elena Emerald. De La O volunteers at her local church and school.

Pamela Nieto serves as the Accounts Payable/Accounts Receivable Supervisor and Payroll Coordinator. Nieto's responsibilities include ensuring all departments are supported with their accounts receivable and accounts payable needs as well as processing their hourly employees payroll.

Nieto started with the Chihuahuas in late 2016. She previously was an Accounts Receivable, Accounts Payable Processor for NCH Marketing Services where she held the position for five years.

Nieto is working towards a Bachelor's Degree in Business and minor in Accounting. She has two children, Emiliano & Julian with her spouse Luis Marcial.

Anthony Rifenburg is the 2022 Broadcast & Media Relations Assistant. Rifenburg is the Chihuahuas No. 2 broadcaster, and his media relations responsibilities include creating daily game notes, stat packs and rosters. Rifenburg also scores Chihuahuas home games for the First Pitch app and finalizes box scores, interviewing players and coaches, facilitating local media coverage and game day interviews and is in charge of the press box on game days.

Rifenburg has had plenty of experience prior to joining the Chihuahuas staff. He served as a broadcaster for his alma mater, California State University, Sacramento (Sac State) Baseball from 2015-2019. While pursuing his studies, he was the Sports Director at KSSU Radio Station, the student radio station of Sacramento State. Rifenburg also had stints as a television broadcaster for 2018 Western Athletic Conference Baseball Postseason Tournament, the Vallejo Admirals, Independent Pro Ball Organization in the Bay Area, broadcaster on ESPN Radio for Klamath Falls Gems, Collegiate Summer league team in southern Oregon, but not before his time as a Little League Baseball umpire as a kid himself.

In his spare time, he served as the head coach of Sacramento State Club Baseball Team in 2014 and 2015.

Rifenburg graduated from Sac State with a bachelor's degree in Communications with an Economics minor in 2019. He has a cat named Whisky.

Valerie Brant joined the El Paso Chihuahuas in 2024 as the Corporate Partnerships Activation Specialist. In this role, Valerie manages and executes sponsorship agreements, ensuring that all promotional activities and partnerships are seamlessly implemented to benefit both the Chihuahuas organization and the El Paso community.

A graduate of St. Edward's University, Valerie earned a Bachelor of Arts in Kinesiology with a minor in Fitness and Conditioning in 2022. She continued her academic journey at the same institution, completing a Master of Science in Organizational Leadership in 2024. During her graduate studies, Valerie interned for St. Edward’s Athletic Department in Game Day Operations during her first year of graduate school and served as a Graduate Assistant Softball Coach during her second year.

Valerie enjoys spending time with her dog, Ellie.

Ross Rotwein is the Senior Director Strategy & Analytics. His responsibilities include business strategies, business analytics, ticket optimization and technology for the Chihuahuas, El Paso Locomotive FC, and Leg Up Entertainment.

Prior to joining the Chihuahuas in 2017, Rotwein started his career as a tax accountant intern for Lauterbach Borschow & Co. and as a tax analyst intern for Hunt Companies. With his tax and analytic backgrounds, Rotwein became the Chief Financial Officer for DaddyO's Drive Thru Inc. in 2015.

Rotwein currently serves as a board member for the Mercer Analytics and Marketing Committee.

A former member of the UTEP Golf Team, Rotwein graduated with bachelor’s degree in accounting in 2013 and followed with a master’s in tax accounting in 2014. Rotwein was once the youngest Men’s Club Champion at El Paso Country Club.

Recently promoted to Coordinator of Ticket Operations, Hector Marquez has been with the Chihuahuas since the 2019 season. His responsibilities include customer service, box office operations on gamedays and non-gamedays, and working with the Season Seat Member team and Group/Premium sales team to ensure a great customer experience at the box office.

Prior to joining the Chihuahuas, Marquez assisted with Arkansas Baseball Little League tournaments and interned with the Phalanx Flight Team in 2017.

Marquez is a 2017 graduate of the University of Memphis graduating with a Bachelor of Arts degree in Sport & Leisure Management with a Minor in History. While at Memphis, he was a member of Memphis' Rugby team. His love for rugby continued after college, as Marquez served as the Cathedral High School rugby coach from 2018-2021, was the Vice President of the Borderland Rugby Association upon his return to El Paso.

One of the first members of the Chihuahuas staff, Primo C. Martinez serves as the Director of Season Seat Sales. As director, Martinez oversees the Season Seat Membership team while working on building, maintaining, and creating relationships with current and potential Season Seat Members. Martinez looks to provide memorable experiences at Chihuahuas games.

Martinez played baseball at Grand View University for two seasons and coached – as a student – during his final season. He also served on Grand View’s Student Activities Council while interning with the Iowa Barnstormers, a member of the Arena Football League. He graduated with a degree in Sports Management in 2013.

Martinez resides in El Paso with his wife Taylor, son Luca, and their dogs Oakley & Miko. He enjoys attending sporting events, playing sports, golfing, concerts, shooting, relaxing, and listening to music and podcasts.

Joshua “Junior” Ybarra serves as a Senior Accountant Executive on our Season Seat Sales team and is the Inside Sales Lead. He joined the Chihuahuas in 2022 transitioning from his previous work experience as a Retail Sales Manager at Metro by T-Mobile and Assistant Manager at Whataburger. He enjoys building relationships and creating experiences for Season Seat Members and the El Paso community.

Ybarra studied at UTEP earning his BBA in Marketing with an accounting minor in 2023. While at UTEP, Ybarra studied under the Chihuahuas Inside Sales Program.

Ybarra resides in El Paso with his family and their two dogs, Lola and Walley. When he is not at the ballpark, he enjoys serving as a member of the San Martin de Porras Ministry and the Knights of Columbus.

Daniel Press is an Accountant Executive with our Season Seat Sales team. Joining the team in 2021 as a Ticket Sales Trainee, Press became full-time in 2022. Press’s responsibilities include maintaining and building lasting relationships with current Season Seat Members and creating new relationships with new and potential members.

Press received his degree in Sports Management and minor in Business Communication from the State University of New York at Oneonta in 2021. His favorite baseball moment is being a two-time state champion in high school. He previously interned with the Danbury Titans hockey team and was a sales associate at his family’s pool supply store.

Press enjoys scuba diving, skiing, and cheering on his hometown New York Knicks, Mets, and Jets.

A native of Muskegon, Mich., Aric Stewart is new to El Paso, entering his first season with the Chihuahuas as a Season Ticket Sales Trainee. The position entails outreach to residents and businesses in finding Season Seat Memberships to fit the needs of a potential client while providing service to members, both current and new throughout the season.

Stewart graduated from Central Michigan University in 2023, with a major in Sports Management and an Athletic Coaching minor. The Chihuahuas are his first opportunity to work in professional baseball. Before making the move to El Paso, he worked in athletic facilities sales & recreation event management where he sold memberships and acted as an administrative presence for youth and adult leagues and tournaments. He also spent three years coaching high school basketball in southeast Michigan.

Stewart is accompanied in El Paso by his cat, Azula, and spends his free time watching sports and playing golf.

Brittany Morgan serves as the Manager of Group Sales for the El Paso Chihuahuas. In her role, Morgan helps to create ideas and execute plans.

Morgan came to the Chihuahuas with experience in the sports industry. She served as the Stadium Operations intern for Iowa Cubs (Triple-A Affiliate of the Chicago Cubs) in 2014 before joining the Orange Bowl as a Ticket Sales intern.

Morgan was a 4-year scholarship letterwinner at Iowa State University. She earned Bachelors of Science in Marketing in the spring of 2014. She has one dog, Chance.

In her 10th season with the Chihuahuas, Janine Quiroz is the Senior Account Executive of Group Sales. Quiroz is responsible for building relationships and creating great experiences for people whether it be for their company, sports team, or just a friends and/or family night out.

In a succession of promotions, Quiroz came to the Chihuahuas in 2016 as an intern. After seeing success, she was awarded a full time position as an Account Executive with the organization.

Prior to the Chihuahuas, Quiroz served as an intern for the Marketing & Promotions Department for University of Texas at El Paso's (UTEP) Athletics.

A member of the United Way of El Paso County's Young Leader's Society, Quiroz graduated from UTEP with a Bachelor of Liberal Arts in Criminal Justice with a minor in Communications in 2015. She is married to Nick Seckerson.

Austin Weber is in his fourth season with the Chihuahuas as a Senior Account Executive for Group Sales. Weber's primary responsibilities include creating memorable experiences and events at Chihuahuas’ games for companies, non-profit organizations, youth teams, and everyone in between.

Weber came to the Chihuahuas with Minor League Baseball experience, having previously worked as an Account Executive with the Pawtucket Red Sox (Boston Red Sox Triple-A affiliate).

A graduate of Nichols College, Weber Bachelors of Science in Business Administration with a concentration in Sport Management in 2016.

Angela Olivas is in her 12th year, serving as the Senior Director for Marketing & Communications for the El Paso Chihuahuas and El Paso Locomotive FC. She oversees the Public Relations, Marketing (including Social Media), Advertising, Promotions & Community Relations (including Mascot) and Video Production efforts for the organization.

Under her leadership the Chihuahuas have become a fan favorite while quickly establishing themselves as a cutting-edge organization and model for success in Minor League Baseball (MiLB). The combination of promotions like Bark at the Park, voted the MiLB Promotion of the Year in 2014, creative giveaways and an innovative approach to marketing (traditional & digital) as well as in-game entertainment has made the Chihuahuas one of the hottest tickets in the entire Southwest.

The Chihuahuas have garnered international, nation, regional and local attention for their marketing and public relations efforts. They are also making a difference in the community through initiatives such as the Chihuahuas Volunteer Pack presented by Helen of Troy, which is volunteer effort that impacts the entire city of El Paso.

The organization has also been a major player in the social media realm. Under Olivas’s watch, the team developed from scratch a Facebook page which seemingly overnight assumed the No. 1 spot in Minor League Baseball. Moreover, the Chihuahuas are on the verge of 300,000 followers across all social media platforms and continue to be an industry leader in creative content and digital advertising.

In her role with the Chihuahuas, Olivas has had the opportunity to facilitate and lecture on the topics of Digital Media and Women in Sports at the Minor League Baseball Innovators Summit (previously Promotional Seminar) and the Minor League Baseball Winter Meetings. She currently serves on the Major League Baseball Advanced Media (MLBAM) Advisory Committee and is a member of Minor League Baseball’s LIFT (Leaders Inspiring Future Talent) program, serving as a mentor to women looking to advance careers in baseball.

After having served as a consultant for El Paso Locomotive FC, El Paso’s professional soccer team and a member of the USL Championship League, Olivas was named Sr. Director in 2021. She is also assists with Public Relations for Leg Up Entertainment, MountainStar Sports Group’s events company. She currently serves on Minor League Baseball's Diversity, Equity, and Inclusion Committee.

Prior to the Chihuahuas, Olivas spent 11 years with the University of Texas at El Paso Athletic media relations department. She worked her way into being name UTEP’s Director of Athletic Media Relations, which at the time made her one of just five females nationally to hold the position at a Football Bowl Subdivision (FBS) school. Olivas graduated UTEP with a bachelor’s degree in Organizational Communication/Public Relations with a minor in Marketing in 2002. She has one daughter, Elizabeth, who is the Marketing Manager for Locomotive.

If you need a life-size poster of Dave Matthews, Ilene Serna is your girl! The creator of sexy, the illustrator of characters, the coordinator of design, this girl's nails alone leave you no question why she was hired as the Creative Services Coordinator for the El Paso Chihuahuas.

While Serna’s background is a pioneer of carefully constructed medal signs atop the towers of steel and concrete that encompass a city’s center, she is no stranger to the diamond. She assisted in the development of videoboard graphics prior to the Chihuahuas inaugural campaign, making her the perfect fit to continue her project after a 4-year hiatus.

Serna earned a Bachelor of Arts in Graphic Design from the Art Institute of Tucson (that sounds cool doesn’t it). While at that cool school in the blistering Arizona heat, Serna founded the Blackout Charity Gallery Shows, allowing local artists to showcase their twisted neon minds lit up under the dark glows of black lighting, all for the good of local charities. Serna is a published illustrator from the children’s book series “Meet Clarabelle Blue” but that is definitely not her claim to fame. Rather, she has been officially published in the Red Hot Chili Peppers' Official Fan Book. It is her love for Anthony Kiedis Flea that her passion crazed her into naming her dog after the bassist. To the dog, it’s all “Water Under the Bridge.”

Parker Landreth joined the El Paso Chihuahuas team in late 2024 as the In-Game Entertainment and Promotions Supervisor. In this role, Parker brings a passion for creating unforgettable fan experiences by developing engaging promotions, writing detailed game-day scripts, organizing exciting in-game skits and activations, and coordinating promotional giveaways. Parker is also instrumental in driving community excitement, ensuring fans of all ages have a memorable time at the ballpark.

A proud graduate of The University of Alabama (Roll Tide!), Parker earned a Bachelor’s degree in Public Relations with a minor in Psychology, graduating in December 2022. During his time at Alabama, Parker honed their skills in storytelling, event coordination, and fan engagement—skills they now bring to the forefront in their work with the Chihuahuas.

Before joining the Chihuahuas, Parker gained valuable experience in baseball and sports entertainment. He spent a year with the Rocket City Trash Pandas and two years with the Birmingham Barons, serving as their Game Day Entertainment Coordinator. Outside of baseball, Parker expanded his expertise by working as a Media Assistant for NASCAR at Talladega and completing an internship with the Loyola Project, showcasing his ability to adapt and excel across various sports and entertainment platforms.

With a dynamic background and a deep enthusiasm for sports entertainment, Parker is dedicated to ensuring every Chihuahuas game is filled with energy, excitement, and unforgettable moments for fans.

Tim Hagerty broadcasts all 150 Chihuahuas games on 600 ESPN El Paso and has been with the team since the inaugural 2014 season. He’s broadcasted in professional baseball since 2004 and previously called games for the Padres’ Triple-A affiliate in Tucson and Portland, as well as for lower-level teams in Idaho Falls, Idaho and Mobile, Ala.

Hagerty graduated from Vermont State University and was inducted into the school’s Hall of Fame in 2023. He’s the author of two baseball books and lives in El Paso with his wife and son.

Irazema Aveytia joined the Chihuahuas in 2024 as the Grounds Administrator overseeing purchasing, invoicing, coding, hiring, onboarding, and scheduling new staff.

Prior to the Chihuahuas, Aveytia was the recruiting intern at UTEP during the 2023 season creating graphics, posting on social media, hosting recruiting events and using recruiting software for new student-athletes.

Aveytia graduated from UTEP in 2022 with a bachelor's degree in Kinesiology and received her master's in education from UT Austin with a concentration in Sports Management in 2023. She recently married Kelton Moss in December of 2024. They have two dogs, Charlie and Minnie.