The NFL's new rules to protect quarterbacks have helped keep them healthy, as 20 quarterbacks started all 16 games last season.

Mark Sanchez started 15 games but was benched in Week 16 for non-injury issues.

Carson Palmer and Brandon Weeden were injured before their team's season finales.

Jay Cutler and Robert Griffin III each missed just one game due to injury.

Last year marked the first time in NFL history that 20 different quarterbacks started every game for their team.

Starters in Week 1 were responsible for 89.6 percent of all quarterback starts over the remainder of the season.

Before last season, 1955 and 1964 were two of the “healthiest” years on record, while 2010 and 2011 weren’t very good years for quarterback “health.”