Urias, a 19-year-old left-hander from Mexico, has been in the Dodgers' system for three years. He is 7-7 with a 2.91 ERA in his minor league career. He was invited to camp in Glendale, Arizona, last year, and appeared in two games.
De Leon, a 23-year-old right-hander, is 16-12 with a 3.61 ERA during three seasons in the minors.
Besides Urias and De Leon, the pitchers are right-handers Chris Anderson, Lisalverto Bonilla, Brooks Brown and Matt West.