Maybin departed Sunday's 12-11 victory over the Rockies with soreness in the tendon, something that has been bothering him of late.
"It's doing OK, it's still a little sore," said Padres manager Bud Black. "We spoke today about if starting today's game would be beneficial. We decided that getting off the Achilles was a good idea. We hope the pain subsides a little."
Will Venable got the start in center field on Tuesday against the D-backs.
The injury comes at a time when Maybin is swinging the bat as good as he has all season. He's hitting .398 in his last 25 games, which is the best average in the Major Leagues over that span. He's tied his career-high with four hits twice in his last 25 games -- Aug. 19 and 21.
Overall, Maybin is hitting .307 in his last 64 games to raise his season average to .248, while he's also been able to cut down on strikeouts as well.