The Philadelphia Phillies looked sharp in the shortened Spring Training season. They finished with a .588 record of 10-7.

Star slugger Bryce Harper led the Phils in home runs with eight, but 25-year-old Mickey Moniak wasn’t far behind. He had a breakout Spring Training performance behind the plate. Unfortunately, Moniak’s strong start to the season will have to pick up again in roughly four to six weeks. The young outfielder suffered a broken hand in the Phillies’ final Spring Training game on Wednesday.

ESPN’s Mike Gill first tweeted the news Thursday afternoon.

This is a huge loss for the Phillies. Moniak finished the preseason with a .378 batting average, 11 runs, 14 hits, four doubles, six home runs, and 11 RBIs.

Live and breathe baseball?

🚨 Get viral MLB graphics, memes, rumors and trending news delivered right to your inbox with the Clutch Newsletter.

According to NBC Sports Philadelphia, Moniak broke his right hand in the fourth inning of the Phillies’ win over the Tampa Bay Rays. He swung and missed the ball, resulting in a strikeout. However, the ball struck Moniak’s hand in the process, causing the injury.

The rising Philadelphia star could miss the first six weeks of the regular season. In the meantime, Harper and the Fightins will get to work.

The Phillies are set to begin their regular season Friday afternoon against the Oakland Athletics. The team revealed their Opening Day roster just after noon Thursday, Moniak included.

Philadelphia has not made an official announcement on Moniak’s injury, and has not updated the Opening Day roster in light of it.