I would bet the Williams, Mantle and Bonds are also on that list.
Mantle did it twice. (BS)
Williams did it twice. (That makes at least three people.) He also hit it in 1955, but while he got over 400 ABs he only played 98 games - not sure if that qualifies. (BS)
Bonds did it twice. (That makes four.) (BS)
Ruth was 8 times! He and Bonds were close to it for their lifetime stats. (YG)
Gehrig was 4 times. (That's six people who did it twice or more. Maybe he meant
exactly twice?) (YG)
Jimmy Foxx 3 times. (That's seven!) (BS)
Hornsby 3 times (J)
DiMaggio once. (YG)
Manny once. (YG)
Frank Thomas once. (YG)
Belle once, in 106 games in 1994. Does that count? (YG)
George Brett once. (J)
Norm Cash once. (J)
ARod never made it.