Wei-Yin Chen allowed just two runs on six hits over 5 1/3 innings Tuesday night against the Mariners. Chen struck out a pair and issued two free passes. All of the Seattle runs came via Miguel Olivo's two-run shot in the fourth inning. Chen has a 5.52 ERA and 1.40 WHIP over his last four starts, perhaps showing signs of fatigue. He'll next face the Blue Jays at home on Monday.