Schreiber had his contract selected by the Red Sox on Wednesday, Julian McWilliams of The Boston Globe reports.
Schreiber was designated for assignment at the start of the season and will now receive another major-league opportunity. The right-hander had a 6.32 ERA in 15 outings for the Tigers last year and has a 3.10 ERA, 1.33 WHIP and 57:21 K:BB over 58 innings for Triple-A Worcester in 2021.