JMF Motorsports and Mercedes-AMG will head into the 2026 GT World Challenge America season finale at Indianapolis Motor Speedway in control of the championship battle. Michai Stephens and Mikael Grenier delivered another crucial runner-up finish in the No. 34 Mercedes-AMG GT3 at Barber Motorsports Park, expanding their Pro championship advantage from four to nine points while Mercedes-AMG strengthened its lead in the manufacturers’ standings.
Another Crucial Podium for JMF Motorsports
Winning races is important, but championships are often decided by consistency.
That philosophy worked perfectly for JMF Motorsports at Barber Motorsports Park, where Michai Stephens and Mikael Grenier finished second overall and second in the Pro class in Sunday’s three-hour GT World Challenge America powered by AWS race.
The result marked a second consecutive runner-up finish for the No. 34 JMF Motorsports Mercedes-AMG GT3 following another second-place performance at Road America.
More importantly, it allowed Stephens, Grenier and JMF Motorsports to increase their championship advantage at precisely the right moment.
The pairing arrived in Alabama holding a narrow four-point lead in the Pro championship. They leave Barber with 114 points and a nine-point advantage over their nearest challengers, who sit on 105 points.
There is now only one race remaining: the Indianapolis 8 Hour.
Stephens Puts the Mercedes-AMG Into the Fight Early
The championship leaders were competitive throughout the Barber weekend.
Qualifying provided an early indication of just how close the battle would become. The No. 34 Mercedes-AMG GT3 narrowly missed pole position to the No. 12 AF Corse USA Ferrari 296 GT3 EVO of Matias Perez Companc and Frederik Schandorff.
The difference in their combined qualifying averages was only 0.027 seconds.
Stephens was particularly impressive during the first qualifying session, setting a 1:21.164 lap that put him ahead of Perez Companc.
Grenier followed with a 1:20.626 in the second session, but the combined performance ultimately left JMF Motorsports on the outside of the front row.
That still put the championship leaders in an excellent position for the three-hour race.
Stephens wasted little time making use of it.
The American driver moved into the race lead during the opening stages, ensuring the No. 34 Mercedes-AMG remained firmly at the center of the fight for victory.
Ferrari Takes the Victory, Mercedes-AMG Takes Valuable Points
The battle eventually swung toward AF Corse USA.
Perez Companc and Schandorff delivered a strong performance in the No. 12 Ferrari 296 GT3 EVO, with Schandorff ultimately taking control of the race during the closing stages.
The Ferrari crossed the finish line 5.638 seconds ahead of the JMF Motorsports Mercedes-AMG after 125 laps of racing.
Grenier still had work to do before securing second place.
An alternative strategy had placed the No. 8 McCann Racing Porsche 911 GT3 R EVO in contention, but Grenier moved the Mercedes-AMG past the Porsche with approximately 40 minutes remaining.
From there, the priority was bringing the car home and collecting another substantial haul of championship points.
Second place might not carry the same immediate satisfaction as a victory, but in the context of the championship, it was an extremely valuable result.
Instead of seeing their four-point advantage disappear, Stephens and Grenier more than doubled it.
JMF Motorsports Now Leads 114–105
The mathematics heading into Indianapolis are straightforward enough to demonstrate just how important Barber was.
Stephens, Grenier and the No. 34 JMF Motorsports team now hold 114 championship points, compared with 105 points for their closest rivals.
That nine-point cushion gives JMF considerably more breathing room than it had entering Alabama.
It does not, however, make the championship comfortable.
The Indianapolis finale is an eight-hour endurance race rather than one of the three-hour events that have defined most of the 2026 GT World Challenge America season. Indianapolis also carries increased championship implications, making reliability, strategy, pit execution and traffic management particularly important.
A nine-point advantage therefore represents a valuable head start rather than a guarantee.
Everything will still be decided at Indianapolis Motor Speedway.
Mercedes-AMG Also Leads the Manufacturers’ Championship
The Barber result strengthened more than JMF Motorsports’ title campaign.
Mercedes-AMG itself will arrive at Indianapolis leading the GT World Challenge America manufacturers’ standings.
The German manufacturer currently has 114 points, giving it a 14-point advantage over its nearest rival on 100 points.
That position reflects a season in which several Mercedes-AMG customer racing teams have been competitive across both the Pro and Pro-Am categories.
JMF Motorsports has naturally played a central role, but the Mercedes-AMG GT3 has been represented by multiple teams capable of fighting toward the front of the field throughout the season.
The result is an opportunity for Mercedes-AMG to leave Indianapolis with both major championship prizes.
Three Mercedes-AMG GT3 Entries Competed at Barber
The No. 34 JMF Motorsports entry produced the strongest Mercedes-AMG result of the weekend, but it was one of three Mercedes-AMG GT3 cars competing in Alabama.
JMF Motorsports also entered its No. 27 Mercedes-AMG GT3 in the Pro-Am category for Jason Daskalos and Philip Ellis.
The pairing finished fifth in class after pit-stop issues complicated their race.
TR3 Racing also returned with the No. 9 Mercedes-AMG GT3 for Brayton Williams and Daniel Morad.
That car arrived at Barber with considerable momentum after winning the previous GT World Challenge America round at Road America.
Williams and Morad again showed competitive speed in Alabama and battled inside the Pro-Am top three during the first two hours. Their challenge ended prematurely, however, when the No. 9 was forced to retire during the final 30 minutes.
The outcome was disappointing after the team’s Road America breakthrough, but its performance again demonstrated the depth of Mercedes-AMG’s GT3 customer racing program.
JMF Has Been a Championship Contender From the Beginning
The No. 34 team’s position entering the finale is hardly accidental.
JMF Motorsports began the 2026 season by winning the inaugural race of GT World Challenge America’s new three-hour format at Sonoma Raceway.
Stephens and Grenier followed that performance with another Pro-class victory at Circuit of The Americas, immediately establishing themselves as the team to beat in the championship.
The campaign has not been completely trouble-free.
At Sebring, the No. 34 appeared capable of another victory and had built a substantial advantage before an oil leak forced Grenier to retire with approximately 45 minutes remaining.
It was exactly the kind of mechanical setback that can completely change an endurance racing championship.
Instead, JMF Motorsports recovered.
That ability to continue collecting major results after difficult weekends has become one of the defining characteristics of the team’s season.
Back-to-Back Second Places Could Prove Decisive
The two most recent rounds provide a particularly good example.
At Road America, Stephens and Grenier finished second overall and in the Pro class, preserving a four-point championship advantage.
At Barber, they did it again.
This time, however, the result increased their lead to nine points.
Neither race ended with the No. 34 Mercedes-AMG on the top step of the podium, yet together they have put JMF Motorsports in a stronger championship position heading into the most important race of the year.
That is exactly what championship-level endurance racing requires.
Outright speed matters, but avoiding unnecessary risks, maximizing difficult weekends and consistently reaching the finish can matter just as much.
Mercedes-AMG GT4 Teams Also Fight at Barber
Mercedes-AMG’s Barber weekend extended beyond GT3 competition.
Three Mercedes-AMG GT4 teams participated in the pair of Pirelli GT4 America races, with several strong performances across the weekend.
The No. 37 Dome Motorsport Mercedes-AMG GT4 of Eddie Killeen and Laura Hayes secured a weekend-best fourth-place result in the Am category during Saturday’s final 60-minute race.
Kevin Clifford and Harry Gottsacker also delivered a fourth-place Pro-Am result in the No. 40 Off-Leash Motorsports Mercedes-AMG GT4.
Meanwhile, BSG Motorsports made its Pirelli GT4 America debut with the No. 81 Mercedes-AMG GT4.
Co-drivers Wes Humphrey and Mike Ogren completed an encouraging first weekend in the series, gaining valuable experience as the team begins its GT4 program.
The Indianapolis 8 Hour Will Decide Everything
For JMF Motorsports, there is now only one objective left.
The 2026 GT World Challenge America season concludes with the Indianapolis 8 Hour at Indianapolis Motor Speedway.
It represents a completely different challenge from the regular three-hour races.
Eight hours of competition create significantly more opportunities for changing track conditions, strategy calls, driver rotations, traffic, caution periods, pit-stop complications and mechanical problems.
It is also a race where simply having the fastest car for one stint is nowhere near enough.
JMF Motorsports will need to execute across the entire event.
But Stephens and Grenier have earned themselves something extremely valuable before arriving in Indianapolis: a championship lead.
The No. 34 Mercedes-AMG GT3 does not need to chase the title from behind. Its rivals do.
Mercedes-AMG Has Two Championships Within Reach
The situation heading into Indianapolis could hardly be more significant for Mercedes-AMG.
JMF Motorsports leads the Pro driver and team championship battle by nine points, while Mercedes-AMG holds a 14-point advantage in the manufacturers’ standings.
One eight-hour race now stands between the team and potentially completing a championship-winning season.
Barber may ultimately prove to have been one of the most important races of the campaign.
Stephens and Grenier didn’t win it.
They didn’t need to.
By finishing second, keeping the Mercedes-AMG out of trouble and maximizing their championship return, they transformed a narrow four-point advantage into a much more meaningful nine-point cushion.
After an entire season of three-hour endurance battles, victories, setbacks and podium finishes, JMF Motorsports and Mercedes-AMG will arrive at Indianapolis with the championship in their own hands.
Now they simply have to finish the job.
