Charles "'Chuck" Mercein (born April 9, 1943) is a former professional American football running back in the National Football League (NFL) who played for seven seasons for the New York Giants, Green Bay Packers, and New York Jets.

As a professional, Mercein is best remembered for his performance in the Packers' game-winning drive in the 1967 NFL Championship Game, known popularly as the "Ice Bowl".

[2] He most notably raised both of his arms behind Bart Starr, who had executed a quarterback sneak to score the game-winning touchdown with 16 seconds remaining in regulation time.

Because physically aiding a teammate into the end zone is a penalty, he was indicating to the on-field officials that Starr was not pushed forward.

While at Yale, Mercein was a member of the Phi chapter of Delta Kappa Epsilon fraternity.