American Kickboxing Academy welterweight,
The news was confirmed to MMAWeekly.com on Friday by sources close to the fighter.
According to sources, Koscheck broke his toe in training, and is not expected to miss much time, but because of the injury he will be unable to compete as early as May.
When contacted by MMAWeekly.com, his opponent Chris Wilson, still had not received word on who the UFC might replace Koscheck with for a bout on the card.
All signs point to the promotion replacing Koscheck, but at this time it's unknown who that fighter might be, or if the bout against Wilson will remain on the main card as the original fight was scheduled.