Washington Nationals shortstop Cristian Guzman agreed to terms Tuesday on a two-year contract extension that takes him through the 2010 season.

The 30-year-old All-Star entered Tuesday night’s series opener at San Francisco batting .310 with five home runs, 34 RBIs, 56 runs scored, three triples and 26 doubles in a team-high 96 games this season.

A switch-hitter, he also led the National League with 129 hits entering play Tuesday, and he had 25 hits with runners in scoring position to lead the team.