The Seattle Mariners have acquired late-inning reliever David Phelps from the Miami Marlins in exchange for minor league outfielder Brayan Hernandez and pitchers Brandon Miller, Lukas Shiraldi, and Pablo Lopez.
The Mariners are currently 48-48 and sit 1.5 games behind the Yankees for the second wildcard seed. Their closer, Edwin Diaz, has pitched fairly well as of recently. Earlier in the season, he was not pitching like many had expected he would. Phelps will most likely be Diaz's set up man and will most likely be used in the eighth inning.
Phelps, 30, has a 3.45 ERA this season in 47 innings for the Marlins. He is 2-4 this season with 51 strikeouts. His best pitch is his mid-90's fastball. Phelps is a strike thrower, as 63% of his pitches this season, have been called strikes. The Mariners will get a controllable arm in Phelps. He does not hit free agency until after the 2018 season.
The Marlins have been looking to restablish their farm system for a while now. With this trade, they will acquire three of the Mariners' top 22 prospects, according to MLB.com. Brayan Hernandez has the most upside of the four heading to Miami. The 19-year-old is a high-risk prospect.