An anonymous NFL player says he was sexually assaulted on a United Airlines plane and claims flight attendants didn't do much to stop it -- and now, he's suing.
The player -- using the alias "John Doe 1" in the new lawsuit obtained by TMZ Sports -- says on Feb. 10, 2020 ... a woman "sexually harassed, assaulted, abused, and violated" him during a flight.
The unidentified footballer says the trip -- a cross-country, red-eye ride from LAX to New Jersey -- was a complete nightmare ... and it was all made worse by United staffers.