When a team selects a player in the Rule 5, it’s a success if said player simply manages to stick on the 25-man roster all year. By that measure, Daniel Stumpf was a clear win for the Detroit Tigers in 2017. Not only did he stick, but Stumpf showed himself a capable lefty specialist who still has the potential for more.
Stumpf struck out 20.4 percent of hitters last season, which is a little below average, but still respectable. Less respectable was a walk rate of 9.4 percent (3.58 per nine innings). Overall he posted a FIP of 4.