Royals put Cruz on disabled list, activate Waechter

The Royals placed struggling reliever Juan Cruz on the 15-day disabled list because of a strained right shoulder prior to Thursday’s series finale against Seattle at Kauffman Stadium.

Reliever Doug Waechter was activated from the disabled list as Cruz’s replacement.

Cruz, 30, has a 6.17 ERA in 43 games and has been remarkably ineffective since mid-May -- allowing 29 earned runs and 36 hits in 28 innings over 27 appearances. He gave up one run and three hits in two innings Wednesday in an 11-6 loss to the Mariners.

Waechter, 28, hasn’t pitched in the big leagues since April 17. He initially went to the disabled list because of a strained right elbow but subsequently suffered a strained left oblique while on a rehab assignment.

Waechter completed a 30-day rehab assignment last Sunday at Class AAA Omaha, where he allowed 10 earned runs and 20 hits in 17 2/3 innings in 12 appearances.