What has already been a frustrating year for Adam LaRoche may get even worse Monday when the Washington first baseman will see another doctor about the slightly torn labrum that has caused him issues since spring training.

LaRoche, who was not in the starting lineup for Sunday’s 2-1 loss at Baltimore, declined to go into specifics after the game about why he’s now getting the shoulder re-examined. But he’s batting just .172 this year, and Manager Jim Riggleman said the club and LaRoche are now concerned it’s more than just a normal slump.

“He’s not progressing at all,” Riggleman said. “He’s getting treatment every day and he’s sore. He’s saying it doesn’t affect his hitting, but he feels like there are a lot of balls he should be crushing and he’s just not doing that. He’s been in slumps before, but this just has a different feel to it so we’re gonna get it checked out further.”

Riggleman said LaRoche will travel with the team for its three-game series in Milwaukee starting Monday, but Nationals now must wait anxiously to see what a new doctor says is the best course of action.

Neither LaRoche nor Riggleman indicated which doctor the first baseman will see. But when asked about the potential for season-ending shoulder surgery, Riggleman didn’t rule it out.

“That’ll depend on what the doctor says tomorrow and how does it feel tomorrow,” Riggleman said. “He’s been playing with this since spring training. It’s a throwing issue for sure and it’s something that will have to be taken care of and he and the doctors now have to make a decision.

“I’m hoping the news is good.”