Aoki, who is hitting .263 in 68 games this season, sustained the injury during the team’s recent series against Detroit. He appeared to aggravate it further while pinch-hitting in Friday night’s 7-5 loss to the Mariners.
The Royals called up Justin Maxwell from the team’s Triple-A affiliate to take Aoki’s spot. Maxwell was hitting .316 in 25 games for the Omaha Storm Chasers. “Excited to be back in KC! Good luck to my @OMAStormChasers teammates,” Maxwell tweeted.