NFL offensive lineman are forced to hold onto a lot of excess weight. Given the size of players in today's league, tackles, guards and centers often check in at 300 pounds, many much heavier than that.
Joe Staley announced his retirement from the NFL back in April, and in an interview with ESPN's Emily Caplan, he explained that he's been able to shed off quite a few pounds -- 50 to be exact -- now that he's no longer on the 49ers' active roster.
"As an offensive lineman, you're always known as this big, humongous, unathletic blob," Staley said.