10,349 Runs: George Brett, 1,583 Hits: George Brett, 3,154 Total Bases: George Brett, 5,044 Doubles: George Brett, 665 Triples: George Brett, 137 Home Runs: George Brett, 317 RBI: George Brett, 1,595 Walks: George Brett, 1,096 Strikeouts: Frank White, 1,035 Stolen Bases: Willie Wilson, 612 Singles: George Brett, 2,035 Runs Created: George Brett, 1,892 Extra-Base Hits: George Brett, 1,119 Times on Base: George Brett, 4,283 Hit By Pitch: Mike Macfarlane, 78 Sacrifice Hits: Frank White, 101 Sacrifice Flies: George Brett, 120 Intentional Walks: George Brett, 229 Grounded into Double Plays: George Brett, 235 At Bats per Strikeout: Cookie Rojas, 13.0 At Bats per Home Run: Steve Balboni, 16.8 Outs: George Brett, 7,673 Career pitching ERA: Dan Quisenberry, 2.55 Wins: Paul Splittorff, 166 Won-Loss%: Al Fitzmorris, .593 WHIP: Bret Saberhagen, 1.134 Hits Allowed/9IP: Jeff Montgomery, 8.05 Walks/9IP: Dan Quisenberry, 1.36 Strikeouts/9IP: Tom Gordon, 7.82 Games: Jeff Montgomery, 686 Saves: Jeff Montgomery, 304 Innings: Paul Splittorff, Strikeouts: Kevin Appier, 1,458 Games Started: Paul Splittorff, 392 Complete Games: Dennis Leonard, 103 Shutouts: Dennis Leonard, 23 Home Runs Allowed: Dennis Leonard, 202 Walks Allowed: Mark Gubicza, 783 Hits Allowed: Paul Splittorff, 2,644 Strikeout to Walk: Bret Saberhagen, 3.30 Losses: Paul Splittorff, 143 Earned Runs Allowed: Paul Splittorff, 1,082 Wild Pitches: Mark Gubicza, 107 Hit Batsmen: Mark Gubicza, 58 Batters Faced: Paul Splittorff, 10,824 Games Finished: Jeff Montgomery, 543 Team records Team batting Highest team batting average: .288 in 2000 Lowest team batting average: .240 in 1969 Highest team slugging average: .436 in 1977 Highest team on-base percentage: .348 in 1999 Total Hits: 1,644 in 2000 Extra-base hits: 522 in 1977 Hits in a game: 26 vs. Detroit on September 9, 2004 (first game) Longest individual hitting streak: 31, Whit Merrifield 2018-19 Most .300 hitters in a single season: 4 in 2000 Home runs: 168 in 1987 Home runs in a month: 12, John Mayberry, July 1975 and Chili Davis, August 1997 and ((Salvador Perez)), August 2021 Most strikeouts: 1,091 in 2009 Team pitching Lowest team ERA: 3.21 in 1976 Highest team ERA: 5.65 in 2006 Most complete games: 54 in 1974 Fewest complete games: 2 in 2007, 2008, and 2011 Most strikeouts: 1,153 in 2009 Fewest strikeouts: 593 in 1983 Most walks: 693 in 2000 Fewest walks: 433 in 1984 Games no walks: 17 in 1992 and 1996 Most hits: 1,648 in 2006 Fewest hits: 1,301 in 1971 Most runs: 971 in 2006 Fewest runs: