Aaron Long did not play last week because of a hamstring injury. (Photo courtesy of MLS)

Aaron Long can play for the Red Bulls, but it will be up to interim head coach Bradley Carnell to decide to use the center back at D.C. United Saturday night.

Long missed last week’s 3-0 home defeat to the Philadelphia Union with a hamstring injury but has been training with the MLS club this week.

“He’s had a good couple of days of training,” Carnell said during a media conference call Friday. “His hamstring seems to be doing well. He’s fully in training and integrated in the team. We have some decisions to make but he’s ready to play.”

Midfielder Sean Davis, who has a knee injury, is still sidelined.