Jimmy Hoffa Jimmy Hoffa James Riddle Hoffa (February 14, 1913 – disappeared July 30, 1975) was an American labor union leader who served as the President of the International Brotherhood of Teamsters (IBT) union from 1957 until 1971. He vanished in late July 1975, at age 62. From an early age, Hoffa was a union activist and became an important regional figure with the IBT by his mid-20s. By 1952 he was national vice-president of the IBT, and was its general president between 1957 and 1971. He secured the first national agreement for teamsters' rates in 1964 with the National Master Freight
Jimmy Hoffa assaulted. The threats from the mafia that they would get rid of Hoffa were taken very seriously; Hoffa's son is quoted as saying "Dad was pushing so hard to get back in office, I was increasingly afraid that the mob would do something about it." There had been three visits in a short time frame to Hoffa's home at Lake Orion and one trip to the Guardian Building law offices by Anthony Giacalone, an alleged kingpin in the Detroit Mafia, and his younger brother, Vito. Friendly with Provenzano and believed to be related to him, their avowed purpose in coming