A's bullpenning strategy: Was it right or wrong?
Rule Changes Mean Value Changes For Many Players - Athletics Nation
Will the Rays 'opener' bullpen strategy make baseball more fun?
The A's may bullpen game the Wild Card Game, and that just might work to the Yankees' advantage - River Avenue Blues
A's try another tactic, but still no playoff success
2018 Baseball History - This Great Game
Three Keys to the A's-Rays AL Wild-Card Showdown - The Ringer
Wild Card Game: Oakland A's can't break October slump, fall 6-2 to Yankees - Athletics Nation
A's bullpen is better than expected, except for one key piece
A brief history of bullpenning - ABC7 San Francisco
Forget Starting Pitchers. It's Bullpen Season.