Seattle Mariners top ten prospects for 2020

CLEVELAND, OH - JULY 07: Jarred Kelenic #18 of the American League Futures Team bats during the SiriusXM All-Star Futures Game on July 7, 2019 at Progressive Field in Cleveland, Ohio. (Photo by Brace Hemmelgarn/Minnesota Twins/Getty Images)
CLEVELAND, OH - JULY 07: Jarred Kelenic #18 of the American League Futures Team bats during the SiriusXM All-Star Futures Game on July 7, 2019 at Progressive Field in Cleveland, Ohio. (Photo by Brace Hemmelgarn/Minnesota Twins/Getty Images) /
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(Photo by Stephen Brashear/Getty Images)
(Photo by Stephen Brashear/Getty Images) /

8. Justin Dunn

Minors (AA): 131.2 innings, 9-5 record, 3.55 ERA, 1.192 WHiP, 39 walks, 158 strikeouts

Majors: 6.2 innings, 2.70 ERA, 16.50 WHiP, nine walks, five strikeouts

One of the pieces acquired by the Seattle Mariners as part of the Edwin Diaz/Robinson Cano trade, Justin Dunn is another pitcher with excellent stuff and suspect command.

Originally used as a reliever in college, Dunn moved to the rotation as a Junior. There, he showed an impressive four pitch repertoire that made scouts fall in love with his potential. Once he showed that he could handle a starter’s workload, it was just a matter of when he would be selected. The Mariners made that pick with the 19th overall selection in the 2016 MLB Draft, adding another intriguing arm to their farm system.

It is easy to be impressed with Dunn. He has a plus fastball that sits in the mid 90s, but has hit 97 MPH. His slider has late bite, and has consistently been a strikeout pitch, especially as he can throw it with varying velocity. Dunn’s curve lags behind the slider, but has shown flashes of at least being an average offering. He also throws a change that has showed some promise against lefties, although it is still a work in progress.

While Dunn has the arsenal to potentially be a middle of the rotation arm, his command and control of his stuff will ultimately determine his fate. He did show improvements in both areas in the minors last season, only to have those issues reappear in his brief major league debut. If that continues, Dunn could ultimately end up as a multi-inning reliever.

Justin Dunn has plenty of potential. However, if he is to reach his ceiling, his control and command of his arsenal will need to improve.