Cardinals Put Mike Mayers, Tyler O'Neill On Injured List, Promote Giovanny Gallegos, Yairo Munoz; Ryan Helsley Makes Debut; Mike Mayers Will Be Out Weeks; Advice On Christian Yelich; Luke Gregerson On Move Again

Mike Mayers’ right shoulder injury is about what was expected. But Cardinals outfielder Tyler O’Neill’s right elbow ailment appears at least a bit more serious than what was assumed Monday night, although O’Neill said he wasn’t concerned.

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