Will Zalatoris has withdrawn from the CJ Cup Byron Nelson citing a flare-up in his back that will require rest after having played the last three weeks. Zalatoris, the No. 30 player in the world ranking who grew up in the Dallas area, had microdiscectomy surgery on his back last April that caused him to miss nine months. The tournament is being held right before consecutive weeks of a $20 million signature event (Wells Fargo Championship) and the PGA Championship.