We knew that Nationals 1B prospect Chris Marrero had injured himself a few weeks ago while finishing up his DWL season with the Licey Tigers, but now, according to Bill Ladson of MLB.com, it appears the injury is more serious than first expected.
Marrero tore his left hamstring, and the tear is bad enough that he might miss the entire season. Marrero insists he won't miss that much time, but did verify that the hamstring was torn off the bone that he has already had surgery.
Marrero wasn't necessarily a starter for the Nats coming into the season, but he was thought to battle for playing time at first base.

