WATCH: 8-year-old 'OneArmGolfer' credit Cards for HRs in back-to-back games

If you didn't already know Chris Carpenter was a great baseball coach, here's a little more proof. Eight-year-old Little Leaguer Tommy Morrissey is crushing the ball, after just one session of batting practice with the former St. Louis Cardinals pitcher.

You might already know Morrissey as the incredible golfer who was born without part of his right arm. He's been featured at PGA Tour events to hit a ceremonial tee shot.

But now he's become a star on the baseball diamond. Last week he was getting some work in with Carpenter at the Cardinals spring training facility: 

What a blessing to hang with @cardinals yesterday at #springtraining . #cyyoung Pitcher #ChrisCarpenter threw me a few which was a major hi-light and #MikeMaddux reminded me to #workhard and #pickuptheballs . All the guys were super cool! A special thanks to #mikeschildt for making it happen! Can't wait to watch a few games at @rdcstadium #THANKYOU #mlb @rawlingssg

A post shared by Tommy Morrissey (@onearmgolfer) on Feb 18, 2019 at 4:48am PST

Thanks for joining us for some BP @onearmgolfer! pic.twitter.com/wNL1qY9PAw

Then when it came time for games, he put on a show. He hit home runs in back-to-back games: 

He might only have one arm but he has all the heart ❤️(via @onearmgolfer) pic.twitter.com/2mnt7fVvSm

A post on the @onearmgolfer on Instagram says the practice with Carpenter "must have been the #magicsauce!"

second #homerun #backtoback games. That batting practice with #ChrisCarpenter and @cardinals last week must have been the #magicsauce! Or is it the bat? #rawlings #ArmandHammer #littleleaguebaseball #cyyoung #dinger #zerohandicap #unlimbited #nevergiveup #CantIsNotAWord #PutMeInCoach #dontstopbelieving #bestteammates ever

A post shared by Tommy Morrissey (@onearmgolfer) on Feb 26, 2019 at 6:41pm PST