Single Season K's: Roger Clemens
Rocket Roger's time in Toronto was polarizing, to say the least. He didn't really want to be here (he signed to stick it to the Red Sox, who decided not to bring him back after 13 seasons, and demanded a trade just two years later), and he subsequently became a poster boy for the PED scandal that plagued the game for many years.
He was also the most electric starting pitcher fans have ever gotten to see in a Blue Jay uniform reaching double digit strikeout totals 25 times in 67 starts. He was worth an absurd 20 wins above replacement in two seasons - on a team that was just four games over .500 over that stretch.
Clemens holds the team's single season strikeout record with 292 - and while both Robbie Ray (2021) and Kevin Gausman (2023) actually achieved higher K/9 totals in the past few seasons, given that starting pitchers rarely cross the 200 inning plateau anymore, it seems unlikely that any Blue Jay will ever have the runway to beat that number.
Single Season AVG: John Olerud
John Olerud was no prototypical slugging first baseman, but his contact skills were elite - and during the magical 1993 season, it all came together. Johnny O flirted with the first .400 season since Josh Gibson's incredible .466 mark in the Negro Leagues in 1943 - only dipping below the .400 mark at the beginning of August.
The overall batting average across the Majors in 1993 was .265 Since peaking at .271 in 1999, it's been steadily dropping ever since - down to .243 in 2024. And currently, only six players across the Majors are even hitting over .300 - one of whom is Bo Bichette. Olerud's record seems pretty safe.
