Born in Leonard Bridge, Connecticut, Rosenbloom was nicknamed "Slapsie Maxie" by a journalist due to his open-gloved style of boxing.

[11][12] After being stripped in 1931, he went on to continue defending his NYSAC and Ring titles, eventually defeating Bob Godwin via fourth-round technical knockout in Madison Square Garden on March 24, 1933.

"The delegates ruled that Maxie Rosenbloom, generally recognized as champion of the class, had violated every law of boxing by his slapping and flicking tactics in the ring.

He became a character actor, usually portraying comical or sympathetic "big guys" in movies such as Each Dawn I Die starring James Cagney and George Raft.

[15] In 1950 producer-director Jules White hired Rosenbloom to team with another veteran champ, Max Baer, for a brief series of slapstick-comedy short subjects.

Maxie Rosenbloom appeared as himself in a number of radio episodes of The Fred Allen Show, including in a skit with Marlene Dietrich.

[18] Rosenbloom, at age 69, died of Paget's disease of bone on March 6, 1976, at the Braewood Convalescent Hospital in South Pasadena, California.