Antonio Brown of the New England Patriots, the most prominent wide receiver in the N.F.L., has been accused of raping a woman who worked as his trainer, according to a federal lawsuit filed Tuesday in the Southern District of Florida.

The lawsuit says that Brown — in three separate incidents, two in June 2017 and another in May 2018 — sexually assaulted a woman named Britney Taylor, a gymnast whom he met while they were attending Central Michigan together and whom he later hired as a trainer.

The lawsuit was filed one day after Brown, 31, became a Patriot following a brief, turbulent tenure with the Oakland Raiders that ended when he requested his release last week. Late Tuesday night, the Patriots issued a statement saying that the N.F.L. planned to do its own investigation of the accusations against Brown.