http://www.mmajunkie.com/news/2013/0...166-in-houston

A middleweight bout between Tim Boetsch (16-6 MMA, 7-5 UFC) and Luke Rockhold (10-2 MMA, 0-1 UFC) is the latest addition to October's quickly filling UFC 166 lineup.

UFC officials confirmed the bout with ESPN.com.

UFC 166 takes place Oct. 19 at Houston's Toyota Center. The main card, which features a heavyweight title fight and rubber match between champ Cain Velasquez and former titleholder Junior dos Santos, airs on pay-per-view following preliminary-card bouts on FOX Sports 1 and Facebook.

It's not clear if Boetsch vs. Rockhold will be part of the main card.

Rockhold is ranked No. 6 and Boetsch is No. 10 in the latest USA TODAY Sports/MMAjunkie.com MMA middleweight rankings.

Boetsch, who had entered the title picture following four consecutive UFC wins in 2012, now finds himself in a must-win situation. The 32-year-old is stuck in a two-fight skid that includes a TKO loss to Constantinos Philippou and a recent decision loss to Mark Munoz. Prior to the setbacks, the former college wrestler was on an 8-1 run that included wins over notables such as Yushin Okami and Hector Lombard.

Rockhold, meanwhile, recently made his UFC debut following a title run in the since-shuttered Strikeforce promotion. However, in May's UFC on FX 8 headliner, he suffered a spinning-back-kick knockout loss to Vitor Belfort. The defeat snapped a nine-fight win streak that included victories over the likes of Ronaldo Souza, Keith Jardine and Tim Kennedy.

The latest UFC 166 card includes:

Champ Cain Velasquez vs. Junior dos Santos - for heavyweight title
Daniel Cormier vs. Roy Nelson
Hector Lombard vs. Nate Marquardt
Gilbert Melendez vs. Diego Sanchez
Tim Boetsch vs. Luke Rockhold
Tony Ferguson vs. Mike Rio