The Cardinals will call up McGreevy from Triple-A Memphis to start Wednesday's game against the Rangers, Katie Woo of The Athletic reports.
The Cardinals are in a stretch of 16 games without a day off, so they'll give McGreevy a spot start in order to provide some rest for their regular rotation members. The 2021 first-round pick will be making his major-league debut Wednesday after turning in a 4.45 ERA and 96:36 K:BB over 109.1 innings covering 20 starts with Memphis. He's not currently on the Cardinals' 40-man roster.