WGC Dell Matchplay - Jason Day & Jordan Spieth Vye for the OWGR #1 Position

Jason Day surprised even himself Thursday with his dominant 5-and-3 victory over Thailand's Thongchai Jaidee at the WGC-Dell Match Play. Questionable for the second round because of what he later described as an inflamed disk in his back, Day eagled his opening hole and made five birdies around the turn to improve to 2-0 this week. “I was actually quite surprised that I got to the golf course and hit the shots without really protecting it,” he said. Day will play Paul Casey on Friday, needing only a half point to advance to the weeken. After limping off the course Wednesday and receiving treatment, Day said he considered undergoing an MRI to see if there was any structural damage. He decided to test his back before the round, going through a half-hour warmup session, swinging fully and aggressively, like he would on the course.  Day, who has battled back issues since he was 13, knew he’d be able to play after his very first tee shot – a 372-yard blast that settled 12 feet away, leading to an opening eagle. Another win by Day this week could move him neck and neck with Jordan Spieth - who won his first round match yesterday - for the OWGC #1 spot. Which player has the best opportunity to come out on top? Share your pick with the Pro Golf Tour: http://progolftournaments.blogspot.com/