The Royals have suffered their first starting setback this season, as third baseman Mark Teahen will be going on the 15 day disabled list today. Teahen left Monday’s home-opening loss to the Mariners in the third inning with back spasms. He’s expected to miss less than a week of action.

In the meantime, the team is expected to recall either Joe McEwing or Denny Hocking from Class-AAA Omaha or move Tony Graffanino over to third until Teahen is ready to play again.