Earlier in the inning, Barajas failed to hold leftfielder Greg Dobbs' throw, enabling Ramon Castro to score on Orlando "El Duque" Hernandez' single to make it 5-1.
Despite the poor outing, Phils manager Charlie Manuel wasn't down on Durbin.
"His command needs improvement, but he definitely has a good fastball," Manuel said. "But overall I liked his arm. He has ability and has an upside to him."
Durbin served homers to Carlos Delgado (two-run shot) and Jose Reyes (solo shot) - both on low fastballs. The pitch to Reyes caught too much of the plate, said Durbin, adding that he thought he made a good pitch to Delgado.
"I've watched the replay 10 times, and I'd probably throw it again," he said. "I'm upset it happened, but you have to tip your cap to him."
As Hernandez was warming up at the start of the first inning, Manuel asked the umpires to inspect his cap because he observed a substance on the back of it.
"If it was legal, fine. If not, I wanted to know," Manuel said.
The umpires said the substance "was resin and dirt and said it was OK," Manuel said.
After the game, Hernandez (4-3), who has a 2.78 ERA and is having one of his best seasons, seemed angry when asked about the umps' search.
"Go ask Manuel," he said.
Mets manager Willie Randolph said the investigation worked to Hernandez's advantage.
"It pumped him up," Randolph said.
Hernandez baffled the Phils with off-speed stuff that rarely reached 70 m.p.h. The 37-year-old righthander allowed two runs - homers by Aaron Rowand and pinch-hitter Chris Coste - in six innings, during which he allowed only three hits while striking out seven and walking two.