Right-hander Erik Shannahan joined the Boomers as a free agent on January 30, 2014.
Shannahan, 22, signs with Schaumburg having finished out his college career at Missouri State University. The 6-foot-3 righty made 32 appearances for the Bears collecting a 3-1 record, three saves and 39 strikeouts with a 2.51 ERA in 38.1 innings pitched.