Hunter Greene has developed into one of the best pitchers in baseball.
But the Cincinnati Reds may not have him available for a little while after an injury.
Greene lasted three innings Wednesday night, not allowing a run.
But then the Reds visited him on the mound, and he walked off injured.
Cincinnati announced he departed with a right groin injury.
It's not something the Reds need at all at this point.
MORE: Braves legend Andruw Jones' son makes a father-like catch
The 25-year old has been a superstar so far this season.
Greene has a 2.53 ERA with 55 strikeouts in 42.2 innings.
Last season, Greene had a 2.75 ERA with 169 strikeouts in 150.1 innings.
He throws as hard as any starting pitcher in baseball history.
The former two-way prospect focused on pitching early in his minor league career and has blossomed into a brilliant ace for Cincinnati.
A groin injury could be tricky for a pitcher, especially one who throws as hard as Greene.
Reds fans will hold their breath and hope for the best.
MORE: Giants score insane amount of runs in 11th inning