A former NFL player is being accused of forcing teenage prisoners into an apparent fight club, authorities said.

One-time Chicago Bears offensive lineman Johan O. Asiata is among four corrections officers at the Illinois Youth Center in St. Charles, Ill., who were indicted on multiple counts by a Kane County grand jury. The other prison guards involved are Michael M. Klimek, Andre L. McFarland and Elliott J. Short.

In January, the guards had juvenile detainees physically fight other prisoners, said Kane County State Attorney Joseph McMahon. According to McMahon, the guards stood back and watched the violence.

“Correctional facilities are not supposed to be nice pleasant places,” McMahon told The Daily Beast. “But they’re also not supposed to be places where people are exposed to harm from correctional employees.”

The Daily Beast reported Asiata joined the Illinois Department of Juvenile Justice as a “special intern.”

Asista, who last played in the NFL in 2011, is charged with five counts of official misconduct, two counts of aggravated battery and one count of unlawful restraint. The hulking guard (as a player, he was listed at 6-foot-4, 310 pounds) struck his victims and brought contraband into the prison, prosecutors said.

If convicted, Asiata faces two to fives years in prison or probation, according to the Chicago Tribune.

He played college football for UNLV, where as a senior, he earned honorable mention All-Mountain West Conference. After going undrafted in 2009, Asista signed with the Bears and spent most of the season on their practice squad. He appeared in just two NFL games before being waived in 2011. In 2013, Asiata played for the Los Angeles Kiss of the Arena Football League.

Asiata also worked as a coach for a Chicago Bears youth camp.