Dallas Cowboys special teams player C.J. Spillman, 28, is under investigation for sexually assaulting a woman on Sept. 20.

The assault reportedly happened at the Gaylord Texan Resort and Convention Center in Grapevine, Texas, police told BuzzFeed News. Sgt. Robert Eberling said the assault involved a woman, but police did not provide additional details.

The center is the Cowboys' official hotel. Police described Spillman as "involved" in the investigation, the New York Daily News reported.

The Dallas Cowboys did not immediately respond to a request for comment from BuzzFeed News Wednesday evening.

Spillman reportedly played in a game the day after the alleged assault, when he made one tackle. He has been a member of the Cowboys for one month and previously played for the San Francisco 49ers, which he joined in 2010.