The Red Sox transferred Groome from Triple-A Worcester to Double-A Portland on Monday.
Boston initially optioned Groome to Worcester when he was cut from big-league camp March 23, but he'll instead open the campaign in Portland. The 23-year-old lefty finished the 2021 campaign at Portland, producing a 2.30 ERA and 1.05 WHIP in 15.2 innings over three starts with the affiliate.