WASHINGTON (Reuters) - Washington Nationals All-Star pitcher Jason Marquis will likely have surgery to remove bone chips in his right elbow and could be sidelined up to eight weeks, the right-hander said Wednesday.

Marquis, who has gone 0-3 with a 20.52 ERA in three starts for Washington since being signed to a two-year contract in December, woke up in pain Wednesday after making a rehab start for Class A Potomac the previous day.

"We have to see where we go from here and talk it over with the team, my agent and my family," the 31-year-old said on the Nationals website (http://washington.nationals.mlb.com).

"I let my team mates down but they are doing a great job. We have a lot of quality guys in here. Hopefully I could come back in August and contribute."

The Nationals were 59-103 last season but are one of the NL's surprise teams this year with an 18-15 record.

(Writing by Mark Lamport-Stokes in Los Angeles; Editing by Steve Ginsburg; To query or comment on this story email sportsfeedback@thomsonreuters.com)