Motor racing - After 50 years, Andrettis look to bookend 500 wins

May 25, 2019; Indianapolis, IN, USA; The 1969 Indy 500 winner Mario Andretti drives a golf cart after attending the drivers meeting for the 103rd Running of the Indianapolis 500 at Indianapolis Motor Speedway. Mandatory Credit: Brian Spurlock-USA TODAY Sports

INDIANAPOLIS (Reuters) - In the run-up to the Indianapolis 500 the spotlight has been on Mario Andretti but come Sunday it is grandson Marco in the crosshairs as he attempts to lift a family curse by returning a member of the clan to Victory Lane at the famed Brickyard.

As usual there are no shortage of high-octane storylines at the sprawling 2.5-mile oval but Marco Andretti's bid to end a 50-year Brickyard barren stretch for American motor racing's first family has dominated conversation.