Trey Mancini left the Baltimore Orioles on Saturday and will miss time due to a "non-baseball medical procedure."
The club has declined to offer more details out of respect for Mancini's privacy.
Mancini had recently been dealing with flu-like symptoms, but it's unclear if that illness has anything to do with his absence.
Alex Cobb told the Baltimore Sun that "there are certain people that you know, without a doubt, are going to beat what they're going through and come back stronger. And Trey's probably the most competitive player I've ever been around and I know when he gets all this taken care of, he's going to take the needed rest, recovery and come back more determined and stronger than ever."