Olmos was reassigned to minor-league camp Wednesday, Tim Britton of the Providence Journal reports.
Olmos was under consideration for one of the final available spots in the Red Sox's bullpen after recording a 1.54 ERA over 11.2 spring innings, but his status as a non-roster invitee was always going to make it difficult for him to crack the Opening Day roster. The 27-year-old is expected to open the season at the Triple-A level, where he posted a 2.88 ERA and 1.33 WHIP in 68.2 innings with Norfolk as a member of the Orioles organization in 2016.