Pirates infielder Jung Ho Kang is the subject of an investigation by Chicago police after a woman accused him of sexual assault, a police spokesman confirmed to the Chicago Tribune on Tuesday.

The woman told police she met Kang through a dating app and he invited her to his hotel room after the Pirates lost to the Cubs on June 17. She claims Kang served her an alcoholic drink and she blacked out soon after, drifting in and out of consciousness as he assaulted her.

The 23-year-old accuser had a rape kit performed on June 19, then filed a formal complaint with police 10 days later.

Kang has not been charged with a crime at this time. Police and Major League Baseball are monitoring the investigation.