WARNING: LOOK AWAY IF YOU'RE SQUEAMISH!!!
Atlanta Braves star Marcell Ozuna JACKED UP his hand sliding into a base during a game Tuesday night ... and there's worry he could now miss significant time over it all.
The gnarly injury all went down in the 3rd inning of the Braves' game against the Boston Red Sox at Fenway Park ... when Ozuna was trying to avoid a tag at third base.
In video of the play, you can see as the ATL outfielder went head-first into the bag .