A video clip captured at a December Chargers-Raiders game went viral, after a fan posted it on Facebook - claiming the security guard was touching himself while on the job.
The security guard was on the field before the game, pleasuring himself just feet away from cheerleaders.
A San Diego TV station has learned the man was quietly investigated, charged and sentenced after pleading guilty to a lewd act in public.
The man, who was fired from his job at Elite Services, voluntarily surrendered his security guard license less than two weeks after the incident.
The man is not being named for his own protection. A background check shows he has no previous criminal record.
He was sentenced to three years probation and counseling for what was listed on court documents as "sexual component".
He does not have to register as a sex offender.
The San Diego station spoke to the woman who posted the video on her Facebook page after claiming neither the Chargers nor Elite Security returned her calls about the incident. After requesting anonymity, she said she hopes the court-ordered counseling will "give him the help he needs", if not, she said, "someone will get hurt later."
The man's attorney said his client won't do an interview.