Earl Bamber Is 348 Points Behind His Own Co-Driver. He Cannot Win a Single One of Them Back.

The largest gap in the 2026 IMSA GTP championship was not created on a racetrack. Jack Aitken leads on 2,400 points. Earl Bamber, who shares the same No. 31 Action Express-run Cadillac Whelen V-Series. R, is fifth on 2,052. The 348 points between them are not the residue of seven rounds of small margins. It is one number, and it is exact.

Aitken scored 348 at Long Beach on April 17-18 — 28 qualifying points and 320 for second place behind the No. 93 Meyer Shank Acura. Bamber scored nothing because Cadillac had him at the FIA World Endurance Championship’s 6 Hours of Imola with Hertz Team JOTA on the same weekend, and Frederik Vesti took the seat. Every other round on Bamber’s line in the official IMSA standings is identical to Aitken’s, down to the qualifying points, because it is the same car.

The gap is now frozen. Two rounds remain: the two-hour-40-minute Battle on the Bricks at Indianapolis on September 18-20, and the 10-hour Motul Petit Le Mans at Michelin Raceway Road Atlanta from September 30 to October 3. Bamber starts both. Aitken starts both. They will score the same points in both. Short of Aitken missing an event, the deficit to the man sitting beside him in the debrief cannot move by a single point before the flag.

Absence costs more than incompetence

This is a function of how the IMSA GTP championship pays. The WeatherTech GTP race scale runs 350 for a win down to 200 for eleventh in an eleven-car class, with qualifying worth another 35 to 20. Finish dead last, six hours down on the leader, and you bank 57 percent of a winner’s score. Miss the race, and you bank nothing. Absence is therefore worth more than twice the entire spread between first and last — 350 against 150.

Road America made the case better than any argument could. Aitken was running second with fewer than ten minutes left when Kevin Estre put the No. 6 Porsche Penske 963 into him at Turn 1 and sent both into the gravel and the barrier, ending the six-hour race under full-course caution. Aitken was classified eighth of eleven. He took 230 race points — 120 fewer than Filipe Albuquerque and Ricky Taylor’s winning No. 10 Wayne Taylor Racing Cadillac, and 90 fewer than the second place he had in hand.

His championship lead over Laurin Heinrich went from 203 points to 118. That is the worst afternoon of Aitken’s season, and it cost him 85 points. Bamber’s diary clash cost him 348.

IMSA’s post-race review, announced on August 7, handed the No. 6 a time penalty equivalent to a five-minute stop-and-hold and placed Estre on probation for the final two GTP rounds for “unjustifiable risk.” Sportscar365 reported the effect precisely: the Porsche dropped from eighth to tenth, the No. 31 moved up to eighth, and the title gap moved from 108 to 118. Being wrecked out of second place in an endurance round, and having the governing body agree in writing that it was not your fault, was worth ten championship points.

Heinrich is the same problem from the other side

The driver chasing Aitken in the IMSA GTP championship has benefited from exactly the mechanism that has buried Bamber. Heinrich sits second on 2,282, of which 755 — a third of his total — were scored at Daytona and Sebring in the No. 7 Porsche Penske Motorsport 963 alongside Felipe Nasr and Julien Andlauer. That car won both. Heinrich then joined JDC-Miller MotorSports from Long Beach, a move RACER described at the time as a one-off, and has stayed there since.

His actual team is fourth in the GTP teams’ standings. The No. 5 JDC-Miller Porsche has 2,045 points, 355 behind the No. 31. Tijmen van der Helm, who has driven every round of it, is sixth in the drivers’ table on the same 2,045. Heinrich is 237 points ahead of his own team-mate for reasons that have nothing to do with either of them, and Bamber is 348 behind his for the same reason in reverse.

None of this is a breach of IMSA GTP championship rules. Both line-ups are legal, both were declared, and Cadillac’s decision to send Bamber to Imola was a rational one for a manufacturer running the same V-Series. R in two championships — the convergence that makes an LMDh chassis eligible on both sides of the Atlantic also makes its drivers a shared resource. But it does mean the GTP drivers’ championship is measuring something other than driving. It is measuring who was on the entry list.

The teams’ table is the honest one

Set the drivers’ standings next to the teams’ standings and the difference is obvious. The No. 31 leads the teams’ championship on 2,400, with the No. 93 Acura on 2,215 and the No. 7 Porsche on 2,159. Cadillac leads the manufacturers’ table with 2,562, ahead of Porsche at 2,450 and Acura at 2,363. Those are defensible numbers. They describe cars that have been quick and reliable across seven rounds, and nothing in them turns on which employee was available in April.

The IMSA GTP championship drivers’ column beside it does. It will crown whichever of the No. 31’s three drivers happened to have a clear diary — and Vesti, who has the same results as Aitken minus Laguna Seca and Detroit, is fourteenth on 1,663 for the same reason.

The IMSA GTP championship uses a flat scale to keep grids full and title fights alive, and it works: with 770 points still available, Aitken’s 118-point cushion is genuinely fragile, and Nasr and Andlauer at 241 back are not out of it. That is an argument for the compression at the bottom of the scale. It is not an argument for the zero. The championship counts every round with no dropped score, which is why one absence outweighs a season. A single dropped result would cut Bamber’s deficit from 348 to 93 and turn a bookkeeping formality back into a race.

For another look at how championship incentives shape driver decisions, read our analysis of why caution may be the wrong strategy for Jon Armstrong.

The teams’ title the No. 31 leads is an honest document: the best car in GTP, run well, over seven rounds. The drivers’ title printed beside it is an attendance register, and in October it will hand a trophy to the one man in that Cadillac who never had a scheduling conflict.