McKirahan was one of two prospects acquired by the Reds on Sunday in exchange for second baseman Brandon Phillips, Zach Buchanan of the Cincinnati Enquirer reports.

McKirahan (arm) was outrighted to Double-A Mississippi on Tuesday, Matt Eddy of Baseball America reports.

McKirahan (elbow) was transferred to the 60-day disabled list Tuesday, the Associated Press reports.

McKirahan (elbow) was officially placed on the 15-day disabled list Saturday, David O'Brien of the AJC reports.

McKirahan (elbow) has a torn UCL and will likely undergo a second Tommy John surgery, Kevin McAlpin of the Braves Radio Network reports.

McKirahan is scheduled for an MRI on Thursday to help determine the cause of his arm tightness, David O'Brien of the Atlanta Journal Constitution reports.

McKirahan left Wednesday's game with an apparent injury after throwing only four pitches, David O'Brien of the Atlanta Journal Constitution reports.

McKirahan came into Tuesday's game against the Orioles to pitch two scoreless innings where he was able to strike out three.

McKirahan was reinstated Monday after serving an 80-game PED suspension, Kevin McAlpin of 680 The Fan reports.

McKirahan (suspension) will remain with the Braves organization and plans to begin a rehab assignment with Triple-A Gwinnett, Kevin McAlpin of Braves Radio Net reports.