Greene has worked hard to improve his changeup, enough to the point where he's willing to throw it on a first pitch to a batter in a plate appearance, Charlie Goldsmith of The Cincinnati Enquirer reports.
Greene still has a chance to make the Reds' rotation out of spring training, instead of beginning the season at Triple-A Louisville as initially anticipated. He and Nick Lodolo both could make it, now that Luis Castillo and Mike Minor will not be ready to start the season.