Mike Ezra, author of “Muhammad Ali: The Making of an Icon,” joins the show to discuss his rankings of all 23 undisputed heavyweight champions from Jack Dempsey to Lennox Lewis.

Listen to “Gotham Boxing | Ranking All 23 Undisputed Heavyweight Boxing Champs w/ Mike Ezra” on Spreaker.

More info: gothamvariety.com, and follow @gothamvariety on Twitter or Facebook. Production and Music: Joe Rubenstein