The lawsuit, the latest in a string of suits against the league, does not specify the wages owed, Courthouse News Service said.
The lead plaintiff in the case is Scott Albrittion, who sued the UFL Management, the Las Vegas Locomotives, the Omaha Nighthawks and UFL founder William Hambrecht.
The players said they told Hambrecht they wouldn't play until they were paid, Courthouse News Service said.
Hambrecht then allegedly told them he would "personally guarantee the players and/or staff's wages/compensations and that he would pay them in full no later than Oct. 31, 2012."
The complaint states that he then gave each player $1,000, but the players were never paid in full.
Two UFL coaches, Marty Schottenheimer and Mark Cuban, have also recently sued the Hambrecht.
The UFL was founded by Hambrecht in 2009 and was disbanded in 2012.
Notable deaths of 2014 [PHOTOS]
Michael Sam cut from the Dallas Cowboys