Lee had been superb against Arizona in six previous starts, going 4-1 with a 2.93 ERA and 42 strikeouts in 43 innings. The left-hander has been dialed into the strike zone against everyone so far this season, entering Saturday night's start with 38 strikeouts and two walks.
Lee's control wasn't quite the same against the Diamondbacks.
Arizona scored two runs off Lee in the first, including an RBI single by Ross that ended a 1-for-22 slump since returning from the disabled list with a dislocated hip. A.J. Pollock added a run-scoring triple in the second inning and Ross made it 5-0 in the third with a two-run single to left.
Lee allowed three earned runs and eight hits in six innings. He also walked two to double his season total.
"They were getting hits. I was missing on the plate a little bit, but they got their fair share of hits on decent pitches, too. Those things happen," Lee said. "I just feel good about keeping it where it was at after the third and continuing to put up a few zeroes there to give us a chance and definitely did that in the last three innings."
Arroyo did his part, allowing two runs and seven hits in 6 1-3 innings, but Arizona's bullpen let it slip away.
Thatcher allowed two runs before being lifted and Cahill labored for the first time since moving to the bullpen. Asche's big double hit first base umpire Bob Davidson before caroming toward the stands, and Ben Revere followed with a run-scoring single that made it 6-5.
"It is embarrassing," Cahill said. "Bronson threw a great game. I should be able to come in and get three outs without letting them take the lead back especially with a three-run lead."
NOTES: Phillies 3B Freddy Galvis is hitless in 21 at-bats after going 0 for 4. ... RHP A.J. Burnett, Philadelphia's starter in Sunday's series finale, has yet to win this season in five starts despite a 2.73 ERA. ... RHP Brandon McCarthy, Arizona's starter on Sunday, tossed eight scoreless innings against the Phillies last season, but did not figure in the decision.