Wei-Yin Chen yielded four runs over 6 1/3 innings in a loss to the Rockies on Friday. Chen held the Rockies scoreless over the first four innings, but he gave up one run in the fifth, one in the sixth and a go-ahead two-homer to Wilin Rosario in the seventh before being pulled. Of the 34 runs he has allowed this season, 17 have been in the fifth inning or later. He'll attempt to buck that trend when he faces the Rays next week at home.