Sixteen days after Gavin DeGraw was brutally attacked outside a bar in NYC's East Village (leaving him with a concussion, broken nose and black eyes), the 34-year-old singer resumed his summer tour with Maroon 5 and Train in Columbia, Maryland on Wednesday.

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Earlier this month, the "Not Over You" singer told VH1 he was eager to get back on the road. "I'm feeling much better, but it will take a little bit more time to be back to 100%!" he said. "I'm overwhelmed with the outpouring of support from my fans, friends and family."

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DeGraw was not attacked because of his celebrity status, multiple sources confirm. "These guys jumped him from out of nowhere. It's weird because they didn't take anything," a source told Us Weekly. "I think they did it for sport."

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Following the attacks, DeGraw was forced to cancel his concerts in Wantagh, New York, and Mansfield, Massachusetts, while he recuperated at home in NYC.

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