Jordan Spieth didn’t ascend to world No. 1 last week at Firestone, but his top-10 finish made his task a little bit easier at the PGA.
Spieth will overtake Rory McIlroy if he wins at Whistling Straits and McIlroy is not second alone.
But there are four other scenarios that would result in a change at the top:
• If Spieth is second alone and McIlroy is not in the top 6
• If Spieth is T-2 with one other player and McIlroy is not in the top 13
• If Spieth is T-2 with two other players and McIlroy is not in the top 33
• If Spieth is third alone and McIlroy misses the cut
McIlroy is returning this week after suffering an ankle injury July 4. He has held the No. 1 spot since last year’s Bridgestone Invitational.