Stumpf threw a new, slower changeup in his spring outing against the Blue Jays on Saturday, The Detroit News reports.
Stumpf had an upper-80s changeup last year, though he only threw it 6.7 percent of the time. Saturday's changeups were clocked in the lower 80s. A more effective changeup would give Stumpf a potential weapon against right-handed hitters, who hit .293 against him last season. The 27-year-old hasn't been a particularly fantasy-relevant pitcher thus far in his career, putting up a 4.34 ERA in 42.2 innings. Relievers can develop seemingly out of nowhere though, so if Stumpf shows positive results early in the season, it may be due to a new pitch and not a total fluke, making him a potential deep-league option.
Stumpf recorded his eighth hold of the season in Thursday's win over the Royals. He pitched a scoreless inning with no hits or walks allowed.
Stumpf has been one of the few Detroit relievers to post decent numbers this season, as he now has a 3.89 ERA for the year. However, he'll have to get that 1.41 WHIP down in 2018 if he wants to sustain success out of the bullpen.
Stumpf (0-1) was tagged with the loss and his second blown save of the season in Saturday's game against the Twins. He allowed three runs on three hits without retiring a batter.
Stumpf has been pitching reasonably well for the Tigers, but he struggled in this one. Stumpf came on after Alex Wilson took a comebacker off the leg and left with a fractured leg in the eighth inning, and Stumpf proceeded to allow three straight singles before getting the hook. All three runners came around to score as the Twins plated eight runs in the inning.
Stumpf has pitched 18.0 innings this season with 16 strikeouts and an ERA of 2.50.
In his second taste of the big leagues, Stumpf is showing improvement from his short stint he had last season with Philadelphia. With the better results, Stumpf might be in line for a bigger role if closer Justin Wilson is traded in the coming days.
Stumpf has five strikeouts and has allowed four runs in 5.1 innings this season.
Stumpf's role this season has been as a left-handed specialist, only pitching a full inning or more in three of his nine appearances this year. He's struggled in his role as hitters have gotten to him, roughed him up to the tune of a .381 batting average. Because of his limited role and poor results, it doesn't appear as if the southpaw retains much fantasy value in any format at the moment.
|10/1/2017 vs Minnesota|
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|More Pitching Stats|
|Minor League Pitching Stats|
|2014||AFA-Wilmington Blue Rock||3||8||3.77||32||8||0||0||2||74.0||82||34||31||1||1||19||79|
|2015||AA-Northwest Arkansas N||5||4||3.57||42||1||0||0||3||70.2||55||31||28||6||2||31||76|
|2016||AAA-Lehigh Valley IronPi||0||0||20.25||2||0||0||0||0||1.1||4||3||3||0||0||0||1|
|2016||AA-Reading Fightin Phil||1||0||4.50||3||0||0||0||0||4.0||3||3||2||0||0||1||3|
|2016||AA-Northwest Arkansas N||2||0||2.11||14||0||0||0||1||21.1||14||5||5||0||2||4||26|