Chargers' Joey Bosa reveals massive calorie intake during offseason bulk: 'It's no fun a lot of the time'

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Los Angeles Chargers linebacker Joey Bosa embraced a different kind of training this offseason that had the four-time Pro Bowler eating an estimated 4,500 to 5,000 calories a day. 

Bosa, 28, told ESPN he worked with a nutritionist ahead of the 2023 season in hopes of bulking up from his weight of around 250 pounds last year.

Los Angeles Chargers linebacker Joey Bosa talks to the media after the team's practice May 22, 2023, at the Hoag Performance Center in Costa Mesa, Calif. (Brandon Sloter/Icon Sportswire via Getty Images)

"I specifically tried to really eat good and put some weight on this offseason, get back to my weight I was at a few years ago, where I could really use my power," Bosa explained after a training camp practice. "Really handle guys in the run and be more effective in that part of the game."

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Bosa underwent surgery after suffering a groin injury in Week 3 against the Jacksonville Jaguars and returned just before the end of the regular season. Injuries and a new defensive scheme called for the drop in weight, but position coach Giff Smith told the outlet this year’s focus was on increasing power. 

Los Angeles Chargers linebacker Joey Bosa reacts against the Jacksonville Jaguars during a wild-card playoff game at TIAA Bank Field.  (Mark J. Rebilas/USA Today Sports)

"He's finally healthy, and he was able to add the muscle mass, good muscle mass, and he feels comfortable. And then it does expose the power. Everybody knows how gifted he is with his hands and his movement, but when you can shock [opponents] with the power, it just has another