Podcast:History Daily Published On: Mon Jul 31 2023 Description: July 31, 1975. Jimmy Hoffa, one of the most influential American labor leaders of the 20th century, is reported missing and never seen again. Go to HistoryDaily.com for more history, daily.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.