The Orioles announced on Monday that Luis F. Castillo went unclaimed on waivers and accepted an outright assignment to Triple-A Norfolk. Baltimore designated him for assignment last week.
Castillo has yet to appear in a big league game with Baltimore. The O’s acquired him from Seattle in a DFA trade in early May. Castillo was immediately optioned and promptly landed on the minor league injured list. He wasn’t ready to return from the IL until June 29, the same day that the Orioles designated him for assignment. His only appearances in the Baltimore system so far have been a pair of rehab starts for their Florida complex affiliate.
The 30-year-old Castillo made a pair of starts for the Mariners in April. He allowed seven runs (six earned) with more walks than strikeouts over seven innings. That marked his first MLB work since his three-appearance debut with the 2022 Tigers. Castillo has been outrighted once before in his career, so he could have refused this assignment, but he’ll remain in the Baltimore system. He figures to occupy a spot in Norfolk’s rotation now that he’s healthy.