Calvin McCarty ( born November 2 , 1984 ) is a Canadian football running back for the Edmonton Eskimos of the Canadian Football League ( CFL ) . He played as a tailback until 2014 , when he became the starting fullback for the Eskimos . McCarty is known for being able to fill many roles at his position , with TSN sportscaster Chris Schultz noting in 2010 that he is a " multi @-@ purpose running back who catches the ball extremely well , blocks well and runs well " . He is a champion of the 103rd Grey Cup .