Wagner was dynamite in the closer role for San Diego as a sophomore a year ago, saving 19 games with a 2.58 ERA, earning second-team All-American honors by the National Collegiate Baseball Writers Association and third-team honors from Baseball America.
He moved back into the rotation as a junior, going 2-5 with a 4.55 ERA in 23 games (11 starts). He struck out 84 batters in 89 innings, but was bit by the long ball, surrendering eight home runs.
The 6-foot-4, 200-pound righty has a three-pitch mix with a sinking fastball and legitimate changeup. His breaking ball, while raw, has the chance to develop into an average Major League pitch. Those tools make him an intriguing starting pitching prospect, with his proven ability to perform in relief a solid fall-back option.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.