Many should have known that Oakland Athletics closer Blake Treinen would be a breakout player this season. After a woeful start to the 2017 season with the Nationals (5.73 ERA in 37 2/3 innings), his season (career?) turned around when he was traded for Sean Doolittle. Treinen became the closer for Oakland after the trade, saving 13 games and posting a 2.13 ERA and 1.16 WHIP in 38 innings.[...]