TJ Waldburger has suffered an injury prior to his bout with Sean Pierson at UFC 161 and will be replaced by Kenny Robertson for the June 15 card in Winnipeg, Canada.

Robertson last defeated Brock Jardine by kneebar while Pierson has won his last two fights against Lance Benoist and Jake Hecht. The Robertson vs. Waldburger fight will be aired on the Facebook preliminary portion of the event.