Joe Grim (born Saverio Giannone; March 16, 1881 – August 18, 1939) was an American boxer of the early 20th century.

[1][2][3] Despite losing the majority of his fights, Grim became a popular fighter; his principal claim to fame was his ability to absorb heavy punishment without being knocked out, for which he was nicknamed "The Iron Man" and "The Human Punching Bag".

Grim "took a battering... that would have killed an ordinary man" and was knocked down repeatedly, but rose to his feet every time and lasted the distance.

[9] Fitzsimmons called Grim "the hardest proposition to knock out that I have ever met" and thought him "insensible to physical pain.

Johnson dominated the six-round fight and by one estimate scored seventeen knockdowns, but Grim again made it to the final bell.

"[11] His reputation as a man who could not be knocked out attracted numerous other high-profile opponents for Grim, among them Barbados Joe Walcott, Jack Blackburn, Joe Gans, Dixie Kid, Philadelphia Jack O'Brien, Battling Levinsky, and Peter Maher, all of whom were unable to stop him, despite many administering heavy beatings.