The Washington Nationals today returned from rehab and reinstated third baseman Ryan Zimmerman from the 15-Day Disabled List, and optioned infielder/outfielder Tyler Moore to Syracuse of the Triple-A International League. Nationals President of Baseball Operations and General Manager Mike Rizzo made the announcement.

Zimmerman, 29, returns to the Nationals after missing 44 games due to a right thumb fracture, suffered April 12 at Atlanta. He rejoins the active roster after hitting .357 (5-for-14) in four rehab games with Single-A Potomac.

Through the first 10 games of the season, before his injury, Zimmerman hit .364 with a .405 on-base percentage and .636 slugging percentage. He clubbed two home runs and three doubles, walked three times and drove in six runs.

Hitting in the middle of the Nationals' lineup, Zimmerman was an integral part of the Nationals' early-season offense. During his time in the lineup, the Nationals averaged 5.27 runs per game - the second-highest average of any team in the National League (Colorado led with 5.50). The Nationals are currently averaging 4.04 runs per game.

Moore, 27, hit .225 (9-for-40) in this latest stint with the Nationals, including one double, one home run, four walks and eight RBI. Moore is hitting .214 (15-for-70) on the season with three home runs, two doubles, seven walks and 11 RBI.