Vince Murdock’s UFC debut will have to wait.

The Team Alpha Male featherweight was informed Thursday that he would not be medically cleared to compete at UFC Minneapolis this weekend. Murdock, 28, was scheduled to fight Jordan Griffin on the ESPN preliminary portion of the card, but announced his withdrawal on social media.

According to Murdock, the UFC requires “some more tests” before he is allowed to fight for the promotion. Murdock was stepping in on less than two weeks’ notice for an injured Chas Skelly. In his post, he did not elaborate on any specific red flags that the UFC or commission may have spotted, if any.

With less than 48 hours before fight night, it is unclear if officials will seek out a new opponent to keep Griffin on the card.

See Murdock’s full statement below: