The Royals' 40-man roster now is full.
The Royals acquired Cruz, 30, from St. Louis last December for Minor League infielder Jose Martinez. Cruz spent most of the year at Triple-A Omaha before getting a September callup. He played in four games for the Royals and did not get a hit in four at-bats.
Collins, 27, missed all of 2015 recovering from Tommy John surgery. The operation was not successful, and Collins had another procedure last March. In 2012, Collins appeared in 72 games with the Royals and posted a 3.36 ERA.
The Royals moved Junis, the club's No.