Next week’s UFC Fight Night 96 event has lost one of its main-card fighters.

Sergio Pettis (14-2 MMA, 5-2 UFC) is injured and has been forced out of his bout with fellow flyweight Louis Smolka (11-1 MMA, 5-1 UFC).

His trainer, Duke Roufus, today announced the scratch due to a “minor injury” (via Instagram). UFC officials haven’t made a formal announcement:

https://www.instagram.com/p/BKqXjuyALyi

UFC Fight Night 96 takes place Oct. 1 at Moda Center in Portland, Ore. The main card airs on FS1 following prelims on FS2 and UFC Fight Pass.

Pettis, who’s an honorable mention in the USA TODAY Sports/MMAjunkie MMA flyweight rankings, had won back-to-back fights over former flyweight title challenger Chris Cariaso and Chris Kelades. That moved the 23-year-old to him 2-1 since returning to 125 pounds after starting his UFC career at bantamweight, where he went 3-1.

Smolka, who’s ranked No. 13 at 125 pounds, has won four straight fights since a split-decision loss to Cariaso. The streak includes bonus-winning knockouts of Richie Vaculik and Ben Nguyen.

The latest UFC Fight Night 96 card now includes:

MAIN CARD (FS1, 11 p.m. ET)

John Lineker vs. John Dodson

Will Brooks vs. Alex Oliveira

Louis Smolka vs. TBA

Josh Burkman vs. Zak Ottow

PRELIMINARY CARD (FS2, 9 p.m. ET)

Joachim Christensen vs. Luis Henrique da Silva

Hacran Dias vs. Andre Fili

Shamil Abdurakhimov vs. Walt Harris

Keita Nakamura vs. Elizeu Zaleski dos Santos

PRELIMINARY CARD (UFC Fight Pass, 7:15 p.m. ET)

Nate Marquardt vs. Tamdan McCrory

Ion Cutelaba vs. Jonathan Wilson

Curtis Blaydes vs. Cody East

Kelly Faszholz vs. Ketlen Vieira

For the latest on UFC Fight Night 96, check out the UFC Rumors section of the site.