World Extreme Cagefighting (WEC) rounded out the main card for its next event, WEC 44: "Brown vs. Aldo" over the weekend by announcing that four-fight WEC veteran Shane Roller (6-2) will fill in for the injured Alex Karalexis to face Danny Castillo (8-2) on the Versus telecast.

Roller has won three out of four fights under the WEC banner with the lone loss coming by first round technical knockout to the new interim lightweight title holder Ben Henderson back in April at WEC 40.

His three victories inside the WEC cage came against Todd Moore at WEC 35 by first round guillotine choke, Mike Budnik at WEC 37 by first round guillotine choke and in his most recent fight he was able to out score Marcus Hicks with a unanimous decision win at WEC 42.

The 30-year-old Oklahoma resident boasts a strong wrestling attack with solid submission finishing ability with half of his career wins coming by way of tapout.

He'll have his hands full with Castillo though, who has also put together a record of (3-1) during his time with the WEC. In his last fight at WEC 42, Castillo picked apart an extremely tough and previously unbeaten Ricardo Lamas on his way to a late second round technical knockout stoppage.

"Cowboy" Cerrone is responsible for Castillo's only career loss after submitting the Sacramento resident with a first round armbar in front of his home crowd at WEC 34 last June.

Like Roller, Castillo also has some decent wrestling and submission skills. The two fighters are very similar in that regard, but Castillo has a much better stand up game with plenty of knockout power, having finished two of his last three opponents with strikes.

WEC 44 is set to go down on Wednesday, Nov. 18, at 9 p.m. ET on the Versus Network from "The Pearl" at the Palms Casino Resort in Las Vegas, Nevada. It will feature a main event featherweight title bout between champion Mike Thomas Brown and feared Brazilian striker Jose "Junior" Aldo.

Former UFC ligthweights Manny "The Pitbull" Gamburyan and Leonard "Bad Boy" Garcia are also slated to due battle in the night's co-main event.

For more on WEC 44 click here.