John William Killilay
- Bats Right, Throws Right
- Height 5' 11", Weight 165 lb.
- Debut May 13, 1911
- Final Game September 22, 1911
- Born May 24, 1887 in Leavenworth, KS USA
- Died October 21, 1968 in Tulsa, OK USA
Jack Killilay, who went 4-2 during his time with the Boston Red Sox in 1911, won 145 games in the minors. Perhaps his most notable minor league season was 1910, when he went 24-10 for the Spokane Indians. After his major league 1911 season, he went 15-4 in 1912 for the Oakland Oaks in the first of three seasons that he spent with the team.
One of Killilay's wins for Spokane was a no-hitter, and his 75 victories in four years with Spokane is still the team record.
An article in Sport Magazine from April 1953, about Mickey Mantle, mentions Killilay as desk clerk at the Miami Hotel (the article is not completely clear as to whether it is in Commerce, OK or Baxter Springs, OK which are only 12 miles apart) talking about how much Mantle's fame had changed the small town.