Updated

Frank Gore doesn't see turning 30 as a bad thing, even if it's the age when most NFL running backs start to decline.

If anything, the San Francisco 49ers' career rushing leader has embraced the milestone and sees it as another means of motivation.

Not that Gore has ever needed extra incentive.

Whether it was being bypassed in the 2005 draft when he was the sixth running back selected or the string of injuries he's endured and overcome since then, Gore has always felt the need to prove people wrong. Even his spot on a recently released list of the top 100 players in the NFL didn't sit well with the ninth-year veteran. Gore was 32nd.

The 49ers clearly know Gore's value and have limited his participation in the offseason workouts, including this week's three-day minicamp.