Juan Pablo Montoya is leaving NASCAR for a return to IndyCar, where he'll drive for Chip Ganassi rival Roger Penske.
The Colombian has agreed to join Team Penske next season as a teammate to current IndyCar points leader Helio Castroneves and Will Power. He could also drive in some NASCAR races as part of the deal.
The move could be seen as a betrayal by Montoya against longtime team owner Ganassi.
Ganassi decided in August he was not bringing Montoya back to his NASCAR program next season. But he and Penske are fierce rivals in IndyCar, and Ganassi driver Scott Dixon is currently locked in the championship battle with Castroneves.
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