Robert Stock

Stock finally earned his first taste of major-league action as a 28-year-old and went on to throw 39.2 good innings, finishing the year with a 2.50 ERA. His underlying numbers back up his performance, as his 22.9% strikeout rate, 7.8% walk rate and 50.0% groundball rate all beat the league average, leading to a 2.71 FIP. If his 2.7 percent HR/FB rate regresses as expected, he'll look less like a high-leverage arm, but Stock should still be a capable middle reliever. His strong debut should be enough to secure a role this season in a Padres bullpen which is full of interesting but unproven arms.