Blake Treinen broke records after posting one of the best seasons for a reliever in MLB history in 2018. His great season led many to believe he had turned the corner as a closer. After up-and-down seasons in his first three years in the league, a trade to Oakland seemed to help rejuvenate him.
Treinen was traded from Washington with Sheldon Neuse and Jesus Luzardo for Sean Doolittle and Ryan Madson in 2017. He enjoyed immediate success with Oakland registering a 2.13 ERA in 35 games, while striking 42 in 38 innings.