Joe Staley has missed the last two 49ers victories with a groin injury.
It's not sitting well with San Francisco's star linebacker. In fact, Willis shared a secret - what's fueling him to return to action.
Willis couldn't sleep after the 49ers recent 34-3 win over the Houston Texans. So what did the 28-year-old linebacker do?
He put on an old episode of "Matlock."
