McDowell already has a win this season at Mayakoba, plus top-5 finishes at Sea Island and the Honda Classic. Reed, No. 10 in the world rankings, is looking to bounce back from a WD, MC and T-52 in three of his last four starts. Mahan, however, has dropped all the way to No. 87 and hasn't finished better than T-43 in four starts in 2016.
The defending champion is "struggling" after a T-21, MC, T-17 in his last three starts. But don't fret, Spieth fans, he already has a win and two other top-5 finishes this year. He kick started his incredible run last year at this event, and don't be surprised if he puts up a spirited defense this week. He'll be joined by Stenson, who is coming off a T-28 at Doral and Haas, who has made five of seven cuts this year.
Dufner, a winner already at the CareerBuilder, just missed out on a top-10 finish at Doral. Thomas has made three straight cuts after two straight MCs at Sony and Phoenix. He also finished T-10 last year at Innisbrook. Knox, two spots behind Thomas in the OWGR at No. 33, hasn't recorded a finish better than T-26, but he did win the WGC-HSBC Champions in November.
Kuchar is making his ninth-career start at the Valspar. He's only played four events this year, with his best finish a T-8 at Riviera. Els has dropped all the way to No. 208 in the OWGR and is still seeking his first top-10 since the 2014 Hong Kong Open. Meanwhile his fellow countryman Oosthuizen has quietly had a nice start to the year. He's recorded a win in Perth and three other top-15 finishes.