Melvin Guillard (Pictures) will not meet Spencer Fisher (Pictures) at UFC 90 on Oct. 25 at the Allstate Arena in Rosemont, Ill., Sherdog.com has learned. Reasons for Guillard’s removal from the card were not immediately known.

In Guillard’s absence, Fisher will face Shannon Gugerty (Pictures), an up-and-comer who will enter the bout on an eight-fight winning streak.

“Melvin is off the card, and they went through three or four opponents and settled on Gugerty,” Fisher told Sherdog.com.

Based out of the revered Miletich Fighting Systems camp in Bettendorf, Iowa, Fisher (21-4) last fought in June when he earned a unanimous decision against Jeremy Stephens (Pictures) at “The Ultimate Fighter 7” Live Finale. The 32-year-old North Carolinian has won 12 of his past 15 fights and holds notable victories against American Top Team’s Thiago Alves (Pictures), TKO lightweight champion Sam Stout (Pictures) and fast-rising UFC lightweight prospect Matt Wiman (Pictures). Fisher has been finished only once -- by Hermes Franca (Pictures) -- in 25 career bouts.

Gugerty (11-2), meanwhile, made his promotional debut at UFC Fight Night 14 in July and submitted the previously unbeaten Dale Hartt with a first-round rear naked choke. A talented grappler, he has stopped his last eight opponents, five of them by submission. Gugerty also owns a submission victory against World Extreme Cagefighting featherweight contender Cub Swanson (Pictures).

A middleweight title fight pairing champion Anderson Silva (Pictures) with Canadian Patrick Cote (Pictures) will anchor UFC 90, along with a key welterweight showdown between Alves and Diego Sanchez (Pictures). In addition, former UFC lightweight champion Sean Sherk (Pictures) will collide with Tyson Griffin (Pictures).