Jordan Spieth and Rory McIlroy headline this week's Northern Trust Open at one of the toughest courses on Tour – Riviera Country Club. Here's what You Oughta Know entering the event (stats courtesy Golf Channel research department):
• James Hahn is the defending champion. He won his first PGA Tour title last year in a playoff over Paul Casey and Dustin Johnson. The last repeat winner at Riviera was Phil Mickelson (2008-09).
• Spieth missed that playoff by one stroke last year, but the world No.