If football doesn't work out, Christian McCaffrey is a sick harmonicist

March 23 (UPI) -- Most mock drafts have Stanford running back Christian McCaffrey penciled in as a first-round pick.

But he doesn't necessarily have to rely on his ridiculous football talents for life. McCaffrey is also very talented at playing the harmonica. The 20-year-old recently played the instrument while performing a rendition of Billy Joel's Piano Man on a Twitter post. He has perfect harmony with a pianist playing the same tune.

According to reports, McCaffrey picked up the instrument during camp.

"I ordered a harmonica on Amazon about $15 and just started messing around with it," McCaffrey told CSN Chicago.

McCaffrey can also play the piano. He ran a 4.48 second 40-yard dash and had a 37.5 inch vertical jump at the NFL Scouting Combine. The first-team All-Conference selection ran for 1,639 rushing yards this season after piling up 2,019 in 2015.

McCaffrey's father Ed was a three-time Super Bowl champion and went to a Pro Bowl as a wide receiver during his 13 year NFL career.