Incomplete medical paperwork has forced UFC welterweight Chris Wilson to withdraw from his UFC 98 fight against Brock Larson at the MGM Grand Garden Arena in Las Vegas, Nevada, tomorrow night (Saturday, May 23), according to Sherdog.com.

MMA veteran Mike Pyle (17-5-1), who's been on standby for the event since early this week, will step in to replace him.

It's been a rough month for Wilson, who was recently the victim of a home invasion in Brazil, where he resides with his wife and children. Now a problem with medical paperwork will keep him on the shelf until he's able to get it straightened out.

From Keith Kizer, Executive Director of the Nevada State Athletic Commission:

"There was no negative finding on Chris at all. We were only requesting more detailed medical information."

Wilson, who was originally slated to face Josh Koscheck before "Kos" hurt his toe, was looking to rebound from a tough split-decision loss to John Howard at UFC 94: "St. Pierre vs. Penn 2″ on Jan. 31. It was the lone bright spot on a rather uneventful card, bringing home co "Fight of the Night" honors.

Now Pyle, who has fought just about everywhere except inside the Octagon, including Elite XC, Strikeforce, Affliction and the IFL (among others), will step in at the eleventh hour and look to notch his fifth straight win against larson.

"The Hurricane" trains alongside several of the best in the business at X-Treme Couture headquarters in "Sin City." He was last seen at "Night of Combat II," where he quickly disposed of Brian Gassaway via armbar.

UFC 98 features a the first-ever main event to include an undefeated champion, 205-pound kingpin Rashad Evans, defending his world title against an undefeated number one contender, Lyoto Machida.

In the co-main event, former welterweight champions Matt Hughes and Matt Serra will finally end their epic grudge match by taping up the gloves and letting their fists do the talking once and for all.

To check out all the latest and greatest news heading into UFC 98 weekend click here.

Check out Wilson's explanation after the jump.