Brad Keller had a strong but brief 2020 season before signing a one-year, $3.35 million deal with the Kansas City Royals. The ace is working to add a changeup to his arsenal after a bloated ERA and WHIP last season. In his last three starts, he has allowed six runs over 20 2/3 innings. Keller’s ERA has dropped from 6.67 to 5.43 in that time.