The Cubs selected Uelmen's contract from Triple-A Iowa on Sunday, Jordan Bastian of MLB.com reports.
Chicago designated reliever Daniel Norris for assignment to clear space on the 40-man roster and 26-man active roster for Uelmen, a 2017 fourth-round draft pick who will reach the majors for the first time in his career. The 26-year-old right-hander turned in a 2.79 ERA, 1.24 WHIP and 52:23 K:BB across 42 innings with Iowa this season.