Cardinals' Keynan Middleton: Starting rehab assignment

Middleton (forearm) will begin a rehab assignment with Double-A Springfield on Tuesday, Daniel Guerrero of the St. Louis Post-Dispatch reports.

Middleton is finally ready to test things out in a game setting after being diagnosed with a right forearm strain back in mid-March. Because he's missed so much time, Middleton figures to require a fairly lengthy rehab assignment before joining the Cardinals' bullpen.