ROCHESTER, N.Y. -- Stephen Strasburg had another dominant outing, giving up just three hits and striking out nine in 6 1/3 scoreless innings for Triple-A Syracuse on Wednesday night.

Strasburg, the top pick in the 2009 draft by the Washington Nationals, walked two against Rochester while improving to 3-0 for the Chiefs. The 21-year-old right-hander has not allowed a run in 18 1/3 innings at the minors' highest level.

He topped out at 99 mph four times, according to the ballpark radar gun, and finished strong, striking out six of the final seven batters he faced.