Nationals starter Stephen Strasburg underwent arthroscopic surgery Friday to remove bone chips in his right elbow, MASNSports.com reports. The surgery was performed by Dr. Neal ElAttrache in Los Angeles.

Strasburg is expected to resume a throwing program in 4-6 weeks. He should be ready to go by spring training.

The starter took a step back from his dominant 2012 campaign. He finished the season 8-9 with a 3.00 ERA, a 1.05 WHIP and a 191:56 K:BB ratio over 183 innings.