Cam Newton missed 14 games in 2019 due to a Lisfranc fracture in his left foot that required surgery in December.
But that might not be the biggest reason why the New England Patriots quarterback went unsigned for months in free agency.
From CBS Sports' Jonathan Jones on Thursday:
"Multiple sources I've spoken to have said if they're concerned about any Newton injury, it's his shoulder far more than his foot."
Newton underwent surgery on his throwing shoulder in March 2017, then had nagging issues with the same shoulder in 2018 that led to a second surgery in January 2019. He completed just 56.2 percent of his passes over two games in 2019, so it's understandable why some are monitoring the 31-year-old's shoulder closely.
Newton has looked strong in Patriots training camp so far, however, outplaying backups Jarrett Stidham and Brian Hoyer over the first few practices. Jones also relayed a silver lining of the injuries that have limited Newton to two games since December 2018.
"A source close to Newton pointed out to me the number of hits Newton has saved himself from with his time off."
Injury concerns were part of why the Patriots were able to sign the three-time Pro Bowler for pennies on the dollar. New England is hoping its investment pays off, and those hopes may rest on Newton's shoulder.