# IMSA championship manufacturer and driver developments > Live situation record from CLSTR: https://clstr.news/situations/imsa-championship-manufacturer-and-driver-developments > Updated: 2026-10-12T22:02:58.000Z. Sources: 7. Developments: 2. Corvette Racing by Pratt Miller Motorsports has confirmed its driver lineup for the 2027 IMSA WeatherTech SportsCar Championship. The team will retain its full-season roster in the Grand Touring Daytona Pro (GTD PRO) class, with Tommy Milner and Nicky Catsburg driving the No. 4 Corvette Z06 GT3.R, and Antonio Garcia and Alexander Sims driving the No. 3 Corvette. Despite this stability in the GTD PRO class, the broader IMSA WeatherTech Championship faces uncertainty regarding its 2027 season. Projections indicate the GTP class grid may shrink to fewer than 10 cars and only four manufacturers. This contrasts with the World Endurance Championship (WEC), which expects 18 factory entries for its Hypercar class in 2027. Participation in IMSA prototypes is reportedly declining, noted by Acura’s departure and Porsche’s decision to focus exclusively on IMSA rather than pursuing WEC and Le Mans until potential rule changes in 2030. Concurrently, the IMSA Esports Global Championship continued its 2026 season with its second round at Sebring International Raceway. In the GTP class, the Porsche Coanda Esports Racing Team secured a victory, while the No. 132 Bleu Mercure Esport Porsche won the GTD class. ## Timeline ### 2026-10-12: IMSA faces manufacturer grid uncertainty amid esports competition wins IMSA faces a shrinking GTP manufacturer grid for 2027, while the IMSA Esports Global Championship saw Porsche Coanda and Bleu Mercure Esport claim class wins at Sebring. 4 sources. https://clstr.news/cluster/imsa-faces-manufacturer-grid-uncertainty-amid-esports-competition-wins ### 2026-10-07: Corvette Racing confirms driver lineup for 2027 IMSA season Corvette Racing by Pratt Miller Motorsports has announced an unchanged GTD PRO driver lineup for the 2027 IMSA WeatherTech SportsCar Championship season. 3 sources. https://clstr.news/cluster/corvette-racing-confirms-driver-lineup-for-2027-imsa-season --- Cite as: IMSA championship manufacturer and driver developments. CLSTR, https://clstr.news/situations/imsa-championship-manufacturer-and-driver-developments