"Drawing of a football player, with the head of an actual player. Written on a sign next to him is 'Michigan's Goal,' and at the bottom "We're Going To Do It Again." The artist's initials are E.M.H. The date on the back is 1914."
MAC won its first football game against Michigan in 1913, so it would appear this postcard is about winning the 1914 game. U-M won the game 3-0.