DAYTON, Ohio – A minor league pitcher accused of throwing a ball that hit a fan during a bench-clearing brawl was charged with felonious assault.

Peoria Chiefs pitcher Julio Castillo was arrested Thursday following the fight with the Single-A Dayton Dragons, authorities said Friday. Umpires ejected 15 players and the team's managers following the brawl.

Castillo, 21, was scheduled to be arraigned Friday, Montgomery County Jail officials said. Video from the game shows Castillo angrily throwing a ball, but doesn't show where the ball landed.

The fan, who remains unidentified, was treated at Miami Valley Hospital and released, said hospital spokeswoman Nancy Thickel. She didn't know the extent of the fan's injuries.

The Dragons are affiliated with the Cincinnati Reds, while the Chiefs are affiliated with the Chicago Cubs.

The fight began after three batters were hit in the first inning. Dayton's Zack Cozart was hit in the head by a pitch.

The brawl lasted about 10 minutes, followed by the ejections.

The teams protested the ejections by phone to Midwest League President George Spelius, saying they didn't want pitchers playing in the outfield to complete the game. After an hour delay, the ejections were reversed and the game resumed. Dayton won, 6-5.

Spelius said Friday that he spoke to the umpires about the brawl. He needs to read a report, review video footage and talk to team officials before any possible sanctions.

Chiefs spokesman Nathan Baliva said Spelius will handle the issue.

"He'll hand down the appropriate punishments he deems necessary," Baliva said.

Reds spokesmen Rob Butcher said Friday neither the Reds nor the Dragons would comment.