Ex-Ole Miss star Ryan Rolison, the first Mississippi product picked — 22nd overall — in the June draft, pitched two innings on Tuesday in his debut for Grand Junction, the Colorado Rockies’ rookie club. The left-hander, who threw 28 pitches, allowed one hit (a home run) and struck out two. He has spent a lot of time since he signed working with former major leaguer Doug Jones, the Grand Junction pitching coach, on improving his changeup. “I’m excited for the challenge,” Rolison told The (Grand Junction) Daily Sentinel when he first arrived there. “It’s challenging being in Colorado because the air’s so thin and the ball flies. Every day we work on drills to locate our fastballs down, keeping them at the knees, and also just developing my changeup into a key pitch for me along with my slider.” Because he threw almost 100 innings for Ole Miss this past season, the Rockies reportedly will limit his work at Grand Junction. P.S. Cody Satterwhite, the former Hillcrest Christian and Ole Miss standout, is pitching in the Mexican League, still chasing the big league dream 10 years after he was first drafted. Satterwhite, 31, has made three appearances this month for the Mexico City Red Devils. He signed there after being released in late May from the Triple-A Syracuse roster in Washington’s system. Drafted in the second round by Detroit in 2008, Satterwhite has endured several injuries and passed through several organizations over the years. His numbers are actually good: 3.47 ERA, 33 saves, 16 wins in 231 minor league games.