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Grant Weaver currently serves as Team Manager at Rahal Letterman Lanigan Racing, a position held since September 2024. Prior experience includes roles as Operations Manager at Pratt Miller and Team Manager at AJ Foyt Racing. Weaver has significant tenure at Chip Ganassi Racing Teams, where from 1994 to 2019, responsibilities included serving as Senior Team Manager, achieving 12 Indycar championships, 108 race wins, and multiple prestigious victories such as four Indy 500 wins and eight Daytona 24-hour race wins. Additionally, Weaver's early career involved roles as Sub Assembly Manager and Chief Mechanic, earning accolades such as Racer Magazine Crew Chief of the Year in 1996.