Kansas City Royals hope Brad Keller's last outing, changeup will 'unlock' his future

Brad Keller owns his eight-walk outing: 'Just unacceptable'

Kansas City Royals move RHP Brad Keller to the bullpen

Kansas City Royals Should Start Thinking About a Brad Keller Contract Extension - Sports Illustrated Kansas City Royals News, Analysis and More

2021 Season in Review: Brad Keller - Royals Review

Second-half season preview, playoff odds for all 30 MLB teams - ESPN

Royals 3 Stars”: Benintendi Carries Kansas City Offense – The Royals Reporter

Assessing the Royals' rebuild, Part 2 (of 2): Draft hits and misses, pitcher progression and what's missing - The Athletic

Is Brad Keller's time with the KC Royals done already?

Three Relievers Who Could Be Key to Turning Around the Royals Bullpen – The Royals Reporter