R's ink reliever

I just learned the Royals have signed former Astros reliever Oscar Villareal to a minor league contract.
Villareal, who posted a 5.02 ERA in 37 2/3 innings last season for Houston, will get a 1 year, $400K deal. Also included in the deal is an agreement that the right hander can get out of the contract (request his release) if he doesn't break the 25 man roster by May 15 or June 1.