Diamondbacks' Zac Gallen: Spring debut scheduled

Gallen will make his first start of spring training Thursday against the Rangers.

Gallen has thrown live batting practice and in a simulated game on the back fields in preparation for his Thursday debut. He'll be followed by Merrill Kelly on Friday, and Arizona's top two starters should each get four starts through the month before Gallen takes the ball Opening Day, March 28, against the Rockies.