Sports IndyCar storylines to watch in 2021: Team Penske contracts, Jimmie Johnson’s debut, return of Bump Day April 14, 2021Nathan Brown, Indianapolis StarComments Off on IndyCar storylines to watch in 2021: Team Penske contracts, Jimmie Johnson’s debut, return of Bump Day The five biggest storylines that stand to have the biggest impact on the NTT IndyCar Series as it embarks on a 17-race schedule starting Sunday.