Wei-Yin Chen struck out nine and allowed four hits in eight scoreless innings, and Matt Wieters hit a three-run homer to break open a tight game, lifting Baltimore to a 4-0 win over Philadelphia Monday night.
Chen (3-4) allowed only five Phillies baserunners all night.
Wieters’ home run, his second of the season, came in the sixth with the O’s up 1-0 on a fifth-inning RBI single by J.J. Hardy.
The win lifts the Orioles to 32-31 and moves them to two and a half games out of first in the American League East.