I was just watching "The Harder They Fall" a great movie with Bogart, Rod Steiger and a bunch of Hollywood character actors including boxers Jersey Joe Walcott and Max Baer (Jethro Bodiens Dad).
Great movie showing the ugly underbelly of Pro boxing. The acting, cinematography and storyline are perfect. Check it out if you have a chance.
https://www.imdb.com/title/tt0049291/?ref_=nv_sr_srsg_2