The Royals outrighted Falter to Triple-A Omaha on Tuesday.
Falter is making $3.6 million this season, so he was a given to pass through waivers after the Royals jettisoned him from their 40-man roster. Declining an outright assignment would've meant forfeiting what remains of his contract, so Falter will report to Omaha and could be used in their rotation.