Stevens was behind the plate on August 20, 1957 when Bob Keegan of the Chicago White Sox pitched a 6–0 no-hitter against the Washington Senators, missing a perfect game only due to walks in the fifth and sixth innings.
[1] Stevens was again behind the plate on April 30, 1967 when Steve Barber and Stu Miller of the Baltimore Orioles combined on a no-hitter against the Detroit Tigers, only to lose 2–1 after issuing ten walks and hitting two batsmen.
Detroit won with two runs in the ninth inning, tying the game on a Barber wild pitch after he had issued two walks, and then bringing in the lead run on an infield error by normally sure-handed second baseman Mark Belanger, who dropped a perfect throw from shortstop Luis Aparicio.
It was the first time in Major League Baseball history multiple pitchers combined on a nine-inning no-hitter only to lose.
[2] Stevens was also working the plate on September 10, 1967, when Joel Horlen threw his no-hitter for the Chicago White Sox against the visiting Detroit Tigers at Comiskey Park before a crowd of 23,625.