• THE UPSHOT

    Who's who of golf stars convenes atop Northern Trust leaderboard

  • Bubba Watson leads at Riviera, but it's still a tough climb to victory with a star-studded leaderboard. (Chris Condon/PGA TOUR)Bubba Watson leads at Riviera, but it's still a tough climb to victory with a star-studded leaderboard. (Chris Condon/PGA TOUR)