
Walker (1-0) was scheduled to face Scott Carson (4-1) at next weekend's Strikeforce event in St. Louis, however after recently suffering a cut under his eye, the organization decided to pull him off the card.
MMA Weekly first reported the news, and MMA Fighting confirmed it with Strikeforce director of communications Mike Afromowitz.
"I feel terrible about this,'' Walker stated in a press release. "I know things like this happen in all sports, but I had trained very hard and was excited to be returning to the cage again. I hope to fight again as soon as the cut heals.''
According to the release, Walker was cut from a knee strike while training with AKA teammate Daniel Cormier.
Walker won his MMA debut in January, defeating Greg Nagy via third round TKO.
Afromowitz said the former Heisman Trophy winner will return to the Strikeforce cage in either January or February.
The fight cancellation leaves only four televised fights planned for the Showtime telecast. However, Afromowitz said the organization is working to add a fifth bout in the coming days.
The event, scheduled for Dec. 4, will be headlined by Dan Henderson vs. Renato "Babalu" Sobral.