The hits keep coming for next month’s UFC 180, which has lost another matchup, a source today told MMAjunkie.

Joe Lauzon (24-9 MMA, 11-6 UFC) is out of a lightweight meeting with Diego Sanchez (25-7 MMA, 14-7 UFC), a source close to the fighter confirmed. The source spoke on condition anonymity because he was not authorized to discuss the matter publicly.

The reason for Lauzon’s withdrawal is unclear, as the source declined to elaborate on why the fighter was forced to withdraw. There is no word yet on a possible replacement for Lauzon with the event less than a month away.

Lauzon had been a replacement for Northern Ireland’s Norman Parke, who withdrew from the event due to an injury.

UFC 180 takes place Nov. 15 at Arena Mexico. The main card airs on pay-per-view following prelims on FOX Sports 1 and UFC Fight Pass. The event was scheduled to be headlined by a heavyweight title fight between champ Cain Velasquez and Fabricio Werdum, but Velasquez suffered an injury that forced him to withdraw. In his place goes Mark Hunt, who will take on Fabricio Werdum for the interim heavyweight title.

Lauzon recently picked up his second straight win after earning a TKO (doctor’s stoppage) over Michael Chiesa at UFC Fight Night 50 in Connecticut. Prior to his recent back-to-back wins, the 30-year-old was stuck in a 1-3 skid. With the Chiesa win, which netted “Fight of the Night” honors, Lauzon now has 13 fight-night bonuses, the most in UFC history. Going after his 14th will have to wait.

Sanchez, a longtime UFC fighter who first joined the UFC after winning “The Ultimate Fighter 1,” won one of MMA history’s most controversial split decisions in June when he topped Ross Pearson in his home city of Albuquerque. That snapped a two-fight skid of decision losses to Myles Jury and Gilbert Melendez for the 32-year-old former title challenger.

With the change, the latest UFC 180 card now includes:

Mark Hunt vs. Fabricio Werdum – for interim heavyweight title

Jake Ellenberger vs. Kelvin Gastelum

Diego Sanchez vs. TBA

Dennis Bermudez vs. Ricardo Lamas

Edgar Garcia vs. Hector Urbina

Jessica Eye vs. Leslie Smith

Chris Heatherly vs. Augusto Montano

opponent TBA vs. opponent TBA – “TUF: Latin America” featherweight final

opponent TBA vs. opponent TBA – “TUF: Latin America” bantamweight final

For more on UFC 180, stay tuned to the UFC Rumors section of the site.

(Pictured: Joe Lauzon)