Miller pitched seven dominant innings for Class A Palm Beach on Friday night. On Saturday, he began the trek north to join the Cardinals' Double-A Springfield affiliate. Miller, still 20 years old, had little left to prove in the Florida State League after racking up 81 strikeouts in 53 innings.
He'll make his Double-A debut sometime late in the coming week, farm director John Vuch said. Vuch explained that it's not just the results that got Miller promoted, but how he did it as well.
"Shelby made solid progress in using all of his pitches at Palm Beach," Vuch wrote in an email. "In his last few starts, he progressively got more of his outs using his changeup and breaking pitch. He'll always be a power pitcher, and we'd certainly want him to continue to work primarily off his fastball, but by having three pitches in his arsenal, he'll be better equipped to compete at the higher levels."
Miller joins Zack Cox, another of the organization's top prospects, who was recently promoted from Palm Beach to Springfield. Cox was the club's 2010 top pick in the First-Year Player Draft, while Miller was the club's top choice in 2009.