Megill's contract was selected by the Cubs on Monday.
Megill was reassigned to minor-league camp in late March, but he'll be in line to make his major-league debut as part of a shuffle after Jason Adam was sent down Monday. Megill made 39 relief appearances in the minors in 2019 and posted a 3.86 ERA and 87:22 K:BB in 60.2 innings. He should mainly work as a low-leverage reliever in the majors.