Gore announced Tuesday on Instagram that he was out of the fight because of a wrist injury, writing that he might need surgery on the scaphoid bone of his wrist.
The UFC is looking for a replacement in order to keep Nickal on the card.
Nickal (4-0) is undefeated and has finished every opponent in the first round. The Colorado native made his UFC debut in March at UFC 285, beating Jamie Pickett via first-round submission. Nickal, 27, is a three-time former NCAA Division I wrestling national champion out of Penn State.
Gore (4-2), a 29-year-old from South Carolina, is a veteran of The Ultimate Fighter’s 29th season in 2021.
Tresean Gore withdraws from UFC 290 fight vs. Bo Nickal