Green caught the eye of several big league teams in 2012 while pitching for the St. Joseph Mustangs of the summer collegiate MINK league. After helping the Mustangs reach the National Baseball Congress World Series in Wichita, Green signed with the Baltimore Orioles.
In three appearances with the GCL Orioles, the 23-year-old right-hander did not allow a run and struck out 10 men in just five innings of relief work.
Green pitched collegiately at Northwest Missouri State University and North Central Missouri Community College. He hails from Joplin, Mo.