Brad Keller

Keller made his professional debut that year with the Arizona League Diamondbacks and was later promoted to the Missoula Osprey.[3] In 15 games (13 starts), he posted a 7–3 record and 2.44 ERA. In 2014, he pitched for the Arizona League Diamondbacks, Missoula and Hillsboro Hops,[4] going 6–4 with a 4.31 ERA over 15 games (12 starts). Keller pitched for the Kane County Cougars in 2015, going 8–9 with a 2.60 ERA over 26 games (25 starts), the Visalia Rawhide in 2016 where he went 9–7 with a 4.47 ERA in 24 starts, and 2017 with the Jackson Generals,[5] where he posted a 10–9 record and 4.68 ERA in 26 starts.[6]

On December 14, 2017, Keller was selected by the Cincinnati Reds in the Rule 5 draft and immediately traded to the Kansas City Royals for cash considerations.[7][8]

Keller made the 25-man roster for the Royals in 2018,[9] and had his MLB debut on Opening Day, March 29, pitching an inning of scoreless relief against the Chicago White Sox; he struck out the first batter he faced, Adam Engel.[10] He split time between the bullpen and the rotation, leading the team in ERA (3.08) and tied for first on the team in wins (9). He struck out 96 batters in ​140 ¹⁄₃ innings. On April 19, 2019 Keller received a 5 game suspension by Major League Baseball, which concluded he intentionally threw a pitch that hit Tim Anderson of the Chicago White Sox.