Jun 02, 2008 9:58 AM EST

Nationals' third baseman Ryan Zimmerman will have an MRI on his troublesome left shoulder on Monday, according to The Washington Post.

He has missed the team's last seven games.

"Well, I just hope for the best, obviously," Manager Manny Acta said. "He doesn't feel that it's anything serious, but not until we have the results from the MRI [will we] find out."

Via The Washington Post