The Red Sox recalled Olds from Triple-A Worcester on Tuesday, Tim Healey of The Boston Globe reports.
The right-hander was optioned to Worcester over the weekend but is already back in the big leagues since Tyron Guerrero (shoulder) landed on the injured list. Olds made six appearances for Boston after getting his first promotion to the majors in mid-August, and he pitched well with an 8:3 K:BB across six scoreless innings.