A junior reliever at Texas Tech, Aaron was 1-0 with a 4.26 ERA in limited action in 2012.
He returns to the Knights after a one-year hiatus. He graduated from Corvallis High in 2009 and starred for the Spartans and for the Richey's Market American Legion program.
Corwin was 3-0 with a 3.66 ERA for the Knights in 2010, with 34 strikeouts in 39.1 innings as a starter/reliever. He was 1-0 in 19 games at Texas Tech in 2011, with a save and 19 strikeouts in 24.2 innings as a reliever.
He played at Feather River (Calif.) JC in 2010.