CHICAGO – PFL 2 takes place today, and you can join us for live and official results beginning at 5:45 p.m. ET (2:45 p.m. PT).

PFL 2 takes place at Chicago Theatre, and the early card streams on Facebook (5:45 p.m. ET) before the main card shifts to NBCSN (9 p.m. ET).

The card, which is part of the “regular season” as fighters try to tally points for the “postseason” playoff tournaments, features a lightweight headliner between Luiz Firmino (20-8) and Will Brooks (18-4). The rest of the 13-bout card includes lightweights and light heavyweights.

Foster lands crushing third-round knee

In the co-main event, Brian Foster delivered an abrupt end to what had been shaping up to be a competitive affair.

Foster (28-10) tagged fellow lightweight and UFC vet Ramsey Nijem (9-7) with a decisive blow. He also nets his 27th stoppage in 28 career wins.

After a back-and-forth first round that saw the fighters jockeying for position against the cage and on the mat, a firefight started the second round as the fighters traded powerful kicks and punches. Escudero, though, forced the fight to the mat, and he maintained top position while dodging shots from below to finish the round with some effective offense from the top.

In the final frame, though, Foster quickly turned the tide with a flying knee that dazed and dropped Escudero. A few follow-up shots from Foster sealed the deal, and the ref waved off the fight just 23 seconds into the final frame (via Twitter):

Foster, who picked up four points with the knockout win, successfully rebounds from a PFL title loss to Jon Fitch in his prior bout.

Gold medalist Harrison dominant in debut

Kayla Harrison said she’s looked to fellow Olympic medalist and judoka Ronda Rousey for inspiration heading into her own MMA career. He first fight was very Rousey-esque.

Harrison (1-0), a two-time Olympic gold medalist, made a successful pro debut after a methodical and dominant win over fellow lightweight Brittney Elkin (3-5).

Once the fight got underway, Harrison clinched, scored a trip takedown, and then went to work on the mat. After moving to dominant positions and raining down punches, she eventually took Elkin’s back, threatened with a rear-naked choke, ultimately moved to an arm, rolled, and then forced a tap-out with an armbar (via Twitter):

It was a quick, efficient and perfectly fitting arrival to pro MMA for one of the top female prospects in recent years.

However, the question now remains: Who can be her next opponents? After competing at 172 pounds in the Olympics and getting down to 155 for her pro debut, PFL officials will need to comb the globe for fitting next foes.

Escudero gets controversial win over High

Jason High briefly shoved a ref and threw a chair, though his anger might be a bit understandable.

After High used takedowns and ground control to edge the first two rounds, lightweight opponent Efrain Escudero (30-13) slapped on a surprise guillotine as he was forced to the mat early in the third round. The ref halted the bout just 35 seconds into the frame after what he thought was a tap. High (21-7) clearly didn’t agree.

When High moved his arm while seemingly try to reset while in top position, Escudero’s corner yelled that he tapped. The ref seemed to agree and halted the bout just a second later. High, though, immediately yelled in anger, shoved his open palm in the ref’s chest, and immediately protested the stoppage to anyone willing to listen (via Twitter):

Replays forced boos from the Chicago crowd, but to the folks that mattered, High’s complaints were unmoving (via Twitter):

Escudero, who picks up four points for the victory, is now on a 4-1 run.

O’Connell goes from booth to victory lap

Sean O’Connell had quite the night.

Early in the night, the former UFC fighter was part of the commentary team for the Facebook-streamed prelims. He then headed backstage and got ready for his main-card opener, in which O’Connell (18-9) scored a second-round victory over fellow light heavyweight Ronny Markes (17-6).

O’Connell was forced to his back throughout the first round after Markes scored a series of takedowns and stymied his opponent’s attempts for a standup or better position. Instead, O’Connell survived until the end of the first round and came out strong in the second. After sidestepping a flying knee and eating a punch, he countered with a vicious lefthand that immediately dropped Markes. O’Connell then rained down a couple dozen punches as Markes could do little but cover up. The stoppage came at the 0:41 mark do the round (via Twitter):

O’Connell concluded his UFC run with three straight losses but is now back in the win column and likely to earn a berth in PFL’s “playoff” tournament after scoring five points with the stoppage win.

Official PFL 2 results include:

MAIN CARD (NBCSN, 9 p.m. ET)

• Luiz Firmino vs. Will Brooks
• Brian Foster def. Ramsey Nijem via knockout (knee and punches) – Round 3, 0:23
• Kayla Harrison def. Brittney Elkin via submission (armbar) – Round 1, 3:18
• Efrain Escudero def. Jason High via submission (guillotine) – Round 3, 0:35
• Sean O’Connell def. Ronny Markes via TKO (punches) – Round 2, 0:41

PRELIMINARY CARD (Facebook, 5:45 p.m. ET)

• Brandon Halsey def. Smealinho Rama via TKO (cut) – Round 3, 0:01
• Islam Mamedov def. Yuki Kawana via unanimous decision (30-27, 30-27, 29-28)
• Vinny Magalhaes def. Jamie Abdallah via submission (rear-naked choke) – Round 1, 1:37
• Rakim Cleveland def. Rashid Yusupov via TKO (injury) – Round 3, 0:01
• Maxim Grishin def. Jason Butcher via TKO (knee injury) – Round 1, 1:40
• Robert Watley def. Thiago Tavares via TKO (accidental low blow by Watley) – Round 2, 0:35
• Natan Schulte def. Chris Wade via unanimous decision (30-26, 30-26, 29-28)
• Dan Spohn def. Bazigit Ataev via TKO (punches) – Round 3, 4:29

For more on PFL 2, check out the MMA Events section of the site.