Rahm builds four-shot lead at Memorial in quest to be No. 1

Tony Finau reacts after missing a putt for birdie at the ninth hole next to Ryan Palmer during the third round of the Memorial golf tournament, Saturday, July 18, 2020, in Dublin, Ohio. (AP Photo/Darron Cummings)

Jon Rahm, of Spain, hits from the 18th tee during the third round of the Memorial golf tournament, Saturday, July 18, 2020, in Dublin, Ohio. (AP Photo/Darron Cummings)

DUBLIN, Ohio — Jon Rahm showed Saturday in the Memorial why he’s one of the most explosive players in golf.