Rojas was designated for assignment by the Angels on Thursday.
Rojas was sent down Monday and will lose his spot on the 40-man roster after Ryan Aguilar and Zack Weiss had their contracts selected Thursday. Rojas has hit just .188 with six homers, 27 runs, 16 RBI and two steals over 83 major-league games across the last two seasons, but he could remain in the organization if he goes unclaimed on waivers.