The change came because manager Bob Melvin wanted to give center fielder Coco Crisp a day off. But Cespedes returned to the position he started every game at prior to his left hand injury.
Cespedes has been challenged early and often in his first stint as the A's left fielder. Melvin spoke about a ball that seemed to fool the outfielder on Friday, and Saturday's game saw a couple of instances that showed Cespedes' newness to the position.
Melvin has said it will take time for Cespedes to get completely comfortable in left, and he reiterated that ahead of Sunday's series finale.
"It's a transition, and when the first ball of the game fools you a little bit, now -- like at any position -- there's some trepidation and you're just not as aggressive and confident with it," Melvin said. "I think the more balls he gets that he reads correctly right away, the more confident he's going to feel. We'll do some stuff at home with balls off the bat, maybe some soft toss stuff where we're trying to direct some balls that have angles to them and so forth, and try to speed up the learning curve."