Before the 2018 season, with a significant amount of starting pitching prospects in the minor leagues, the Phillies opted to move Seranthony Dominguez to the bullpen where his high-octane arsenal would play up. That move proved to be successful as Dominguez rocketed up the minor-league leader to Philadelphia.
Dominguez allowed just three earned runs and struck out 18 batters in 13 innings for Double-A Reading to start off the year. After just three shutout appearances in Triple-A Lehigh Valley, Dominguez was promoted to the majors at the beginning of May. Just eight months prior he was in High-A Clearwater.