Carolina Panthers rookie running back Christian McCaffrey just reminded the NFL world how very young he actually is.

Go figure. McCaffrey, who turned 21 in June, will now look to shred a defense coached by his old babysitter and San Francisco 49ers head coach Kyle Shanahan.

The Panthers take their game out west to face the 49ers at Levi’s stadium. McCaffrey does indeed stand to do some damage against a San Francisco run defense that ranked dead last in 2016. The unit allowed a league-high 25 rushing touchdowns and 4.8 yards on average per attempt.

It should be worth watching McCaffrey reunite with his childhood babysitter while he makes his first official regular season appearance.