The Rockies optioned right-hander Alex White to Triple-A Colorado Springs on Monday, ending their four-man starting rotation experiment. Drew Pomeranz, who was sent down in May to correct delivery flaws, is under consideration for a promotion. White has posted a 9.58 ERA with 18 hits and 10 walks in 10 1/3 innings in his last three starts. Colorado acquired White and Pomeranz from Cleveland in the Ubaldo Jimenez trade last year.