Red Bulls head coach Gerhard Struber was not a happy camper in the second half. (Kyle Ross-USA TODAY Sports)

CHESTER, Pa. – The Red Bulls came back down to earth after two consecutive clean sheets as they were shutout by the Philadelphia Union, 1-0, at Subaru Park Saturday night.

Cory Burke scored in the ninth minute for the Union (2-2-2, 8 points) while the Red Bulls (6) fell to 2-3-0. He ran onto a pass from Jamiro Monteiro and slipped his shot past goalkeeper Carlos Coronel before 5,000 fans.

“We’re going to look back and watch film and be really disappointed in that first half,” captain Sean Davis said. “I don’t think it was a mature performance. I think we look like a young team at times. I think that falls on the veterans it falls on us not getting the team prepared in the right way when the game starts and managing things on the field the right way. But I just thought we lost our duels. We were second to a lot too much. And then we weren’t good enough on the ball.”

Added head coach Gerhard Struber: “I think, especially the situation that we get in very early, by allowing the goal early. I think some players you can see we are young group and we cannot always handle from one moment in the other moment, our mindset and I think in some moments it was a big learning for some younger players today. We can see in some moments that Philly is long time together.”

Patryk Klimala made his Red Bulls debut, replacing Daniel Royer at halftime. Thirteen minutes into the second half, he collected a ball that deflected off Philly goalkeeper Andre Blake and sent a cross across the goalmouth, but no one could finish.

Red Bulls substitute Dru Yearwood, who replaced Caden Clark in the 76th minute, earned two yellow cards within a 13-minute span and was given his marching orders two minutes into second-half stoppage time.