Phillies’ outfield prospect Mickey Moniak was placed on the 7-day injured list on Thursday with a hamstring strain.

Moniak, the first overall pick in the 2016 MLB Draft, suffered this hamstring injury this past Sunday. He made an awkward sliding catch in center field, and was removed from that afternoon’s game. Moniak has been out of the Double-A Reading Fightin Phils’ lineup since.

This injury comes at an especially devastating time for Moniak. He had been tearing up the Eastern League as of late.

The 21-year-old had a tremendous month of June, adding to what has been his best season since the year he was drafted. He posted a .392 OBP in 29 June games, along with an OPS of .872.

“Focusing on having a better approach,” said Moniak on what allowed him to excel last month. “Trying to get my pitch, and taking my walks when they weren’t really giving me anything to hit.”

This approach allowed Moniak to rack up 15 walks in June, an area he had struggled in his whole career. This is the type of adjustment that can bring a prospect to another level. If he can continue to be selectively aggressive at the plate and take the walks they give him, Moniak could be in store for many more months like June.

The injury bug may have put it on hold, but be ready to see more of The Mickey Moniak Show when he is back on the field.