Jeffreys was a 2012 first team All-PAC selection. He was also a first team All-NCCAA East region selection.
In 2012, Jeffreys led the Geneva pitching staff with a 7-4 record and a 3.69 ERA in 68.1 innings of work. He struck out a team best 78 batters while walking just 19.
Offensively, Jeffreys hit .330 with 37 hits a pair of homers and 16 RBI.