From the AP :
Alecko Eskandarian, a New Jersey native, scored his first goal four minutes before halftime to put D.C. ahead, 1-0.
He then ran to the D.C. United bench, where his teammate Jamil Walker threw him a can of Red Bull energy drink. Eskandarian celebrated his score by opening the can and drinking a mouthful before quickly spitting it out.
“By no means was that trying to offend anyone,” Eskandarian said. “It was just something funny for the guys to laugh at in the locker room. They’re our rival. It was a joke.”
His no-nonsense coach, Peter Nowak, said he didn’t think Eskandarian meant to offend anyone, but club officials thought it was poor sportsmanship.
Asked whether the celebration was planned, Eskandarian said with a sly smile, “I’ve had a history of concussions, so I can’t really remember.”
addendum : Video footage of the offending celebration (windows media player required)