The actor, who plays smooth advertising executive Don Draper in the hit TV show, went to bat on Sunday (08Jul12) at the Taco Bell All-Star Legends & Celebrity Softball Game in Kansas City.
Hamm took to the pitch alongside other stars including Glee's Chord Overstreet, Modern Family's Eric Stonestreet, Desperate Housewives actor James Denton, model Chrissy Teigen and former American Idol competitor David Cook.
The game at the Kauffman Stadium also featured sports stars including soccer ace Carlos Bocanegra, UFC star Jon 'Bones' Jones and baseball legends Rickey Henderson and George Brett.
Sporting legend Bo Jackson also took part by managing one of the teams and Hamm admits he was overwhelmed to meet his idol. He says, "(It was) terrifying. He's amazing. And he's a right-handed hitter and a very, very strong man."