Steve Young's career ended following a series of concussions and spoke about how the NFL has become more conservative in allowing players to return from the injury.

Both Jay Cutler and Alex Smith did not play in Monday's game between the 49ers and Bears due to concussions.

“The truth is 15 years ago, neither of these quarterbacks would sit out,” Young said on the field at Candlestick Park before the game.  “Big games, people on the cusp of feeling better, you’d usually err on the side of playing. I’d be the first one to run out there.”