Kellymoss returns to IMSA WeatherTech championship full-time in 2027
Longtime Porsche customer team Kellymoss will return to full-time IMSA WeatherTech SportsCar Championship competition in 2027. Michael Clark will make his IMSA debut in the Grand Touring Daytona (GTD) class in the #17 Porsche 911 GT3 R (992), partnering with Colin Braun for the full season. Kyle Marcelli joins for the IMSA Michelin Endurance Cup rounds, with a fourth driver for the Rolex 24 At.
Across the NASCAR Cup Series garage, crew chiefs from Hendrick Motorsports, Team Penske, Joe Gibbs Racing, and 23XI Racing are operating on razor-thin Next Gen parity margins—where pit-road gun speed, Goodyear tire pressure bleed schedules, and stage-point aggression dictate track position. In global sports car endurance racing across FIA WEC Hypercar and IMSA WeatherTech GTP, Balance of Performance (BoP) weight and power tables, double-stinting Michelin slicks through night temperature swings, and multi-class GT3 traffic management separate podium contenders from the field. From a race-strategy standpoint, thermal and mechanical tire degradation remain the primary performance differentiators: teams that keep carcass temperatures inside the sweet spot can extend their opening stint by 3 to 5 laps and neutralize rival undercut attempts. Reporting originally surfaced via motorsport.com, and our Apex Daily Paddock Desk has broken down the sporting, technical, and championship context below so you have the complete picture in under two minutes.
- Multi-Stint Pace & BoP Management: Winning in Hypercar, GTP, and GT3 requires zero pit-lane penalties, rapid driver changes, and preserving tire carcass integrity across changing track temperatures.
- Manufacturer Championship Prestige: Factory programs from Porsche, Ferrari, Cadillac, Toyota, BMW, Corvette, and Ford measure success across Daytona, Sebring, Spa, and Le Mans.
- How to Watch Live: Follow IMSA WeatherTech and FIA WEC endurance rounds flag-to-flag on Peacock, NBC, Max, and FIA WEC TV.
Across the wider Endurance paddock, this development connects directly to several active storylines on the Apex Daily wire: read our full briefing on Haywood Headlines Third List of Sebring “Class of 75”, plus From Dirt Ovals To GT3: Hanley’s Road To IMSA With HMI, and Factory-backed Porsche star poised for Adelaide cameo. For deeper technical context, explore our original Sim Racing (Le Mans Ultimate / iRacing) to Real Prototype Guide →.
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FIA WEC Hypercar and IMSA WeatherTech SportsCar rounds stream on Peacock, MotorTrend, and FIA WEC TV. Full US CST/EST TV Guide → · Endurance Standings & Hub →