Greene was scratched from his scheduled start at Triple-A Louisville on Wednesday due to irritation in his right AC joint, Bobby Nightengale of The Cincinnati Enquirer reports.
Although Greene will be unable to take the mound Wednesday, he's still expected to be ready to make his next turn through the rotation. The right-hander has made nine starts since he was promoted to Triple-A Louisville in mid-June, and he's recorded a 3.63 ERA and 1.22 WHIP in 44.2 innings.