The Hill City Howlers' single-season records showcase standout performances across several decades of play. In the batting categories, Jim Negrych holds the highest batting average with .370 in 2008, while Jose Guillen's 1996 season remains one of the most productive in franchise history, leading the team in hits (170) and ranking in the top five for batting average and RBIs. Power hitting is anchored by Bobby Bradley and Aramis Ramirez, who share the single-season home run record with 29 each. On the basepaths, Pedro Powell delivered two of the most prolific seasons for the team, recording 67 stolen bases in 2007 and 63 in 2006.
The pitching records are headlined by Sean Burnett, who set the benchmark for Earned Run Average at 1.80 in 2001 and is tied for the most wins in a season with 13. Triston McKenzie also features prominently in the record books, holding the single-season strikeout record with 186 and the lowest opponent batting average at .203, both achieved in 2017. Durability records are led by Kevin Pickford, who holds the top spot for innings pitched at 172 1/3, and a group of seven pitchers who share the lead for most games started in a single season.