PITTSBURGH -- According to manager Davey Johnson, Nationals first baseman Chris Marrero is having problems with his right shoulder and left hamstring.
Johnson believes Marrero is another month or two from playing in a Major League game. Marrero tore his left hamstring while playing for the Licey Tigers in the Dominican Winter League this past offseason.
Marrero, who is considered a backup first baseman, hurt the hamstring stretching for a thrown ball.
Johnson believes the shoulder problems were caused by the fact that he was overaggressive during his rehab.
"I think the shoulder stuff is coming from a lot of hitting, throwing and a little weight work," Johnson said. "I'm not as concerned about some of the medical reports on the shoulder."