A former New Jersey firefighter has been charged with fraudulently collecting more than $82,000 through a disability pension while teaching jiujitsu and participating in a mixed martial arts competition, the state Attorney General’s Office said.

Shane B. Streater, of Camden, New Jersey, was charged with second-degree theft by deception on Tuesday, the state Attorney General’s Office said Wednesday in a statement.

“It’s outrageous that this former firefighter was showing off his prowess in mixed martial arts, all the while that he was lying about a disability and collecting benefits from the firemen’s pension system,” John J. Hoffman, acting attorney general, said in the statement. “His conduct was a slap in the face of his colleagues in the fire department, who continued to risk their lives to protect the public and honestly earn their pay.”

Mr. Streater applied for an accidental disability pension in 2009, claiming to have injured his back and neck as a result of work-related accidents in 2007 and 2008, when a car struck his fire truck and when his fire truck hit a pothole, respectively, the statement says.

According to the statement, an independent doctor found that Mr. Streater’s disability resulted from a pre-existing condition, not from his work-related accidents.

Mr. Streater was awarded an ordinary disability pension by the Board of the Police and Firemen’s Retirement System in 2010, though he insisted he was entitled to an accidental disability pension, which is untaxed and pays more of the beneficiary’s salary, the statement says.

While investigating Mr. Streater’s appeal, a deputy attorney general learned he had been teaching jiujitsu, for which he was awarded a black belt in 2010, at least twice a week, according to the statement. The investigation also uncovered a YouTube video of Mr. Streater participating — and winning a bronze medal — at the Grapplers Quest Mixed Martial Arts Tournament in June 2010.

The Board of the Police and Firemen’s Retirement System revoked Mr. Streater’s disability pension in 2012 after he had collected $82,488 in benefits, the statements says.

Second-degree crimes, such as the one Mr. Streater is charged with, carry a sentence of five to 10 years in state prison and a criminal fine of up to $150,000, according to the statement. The case will be presented to a grand jury.