On May 27, the Glee alum announced that he was leaving the show's 17th season because he "did not follow competition production protocol" as a judge. He told E! News in a statement, "Having the opportunity to be a judge on So You Think You Can Dance was an incredible honor for me. Therefore, it is my deepest regret to inform you that I will be leaving the show."
He continued, "After filming the audition rounds for the show and completing the selection of the 12 finalists, I did not follow competition production protocols, preventing me from being able to judge the competition fairly. I cannot apologize enough to all involved and I will be watching alongside you all on what I know will be one of the best seasons yet."
Morrison did not elaborate on the specific protocol.
The news came after SYTYCD staple Nigel Lythgoe, who created the series alongside Simon Fuller and judged 16 of its seasons, confirmed that he won't be returning.
"I am so thrilled that America's young aspiring dance talent will get to work with some of our greatest creative choreographers," Lythgoe tweeted in March. "On a personally sad note, I have not been asked to be on the judging panel this season. I don't know who will be saying 'Cue Music' but I wish them well."
Mary Murphy, who judged all but five seasons of SYTYCD, also did not return when the show's latest run premiered earlier in May.
A rep for Fox told E! News that a new judge will be announced before the next wave of competition starts on June 15.
So You Think You Can Dance airs on Wednesdays 9 p.m. on Fox.