Groome (back) is in Fort Myers (Fla.) working on a throwing progression, Ryan Hannable of WEEI.com reports.
Groome, who was selected in the first round (12th overall) of the 2016 draft, left his first start at Low-A Greenville in 2017 after just 1.1 innings. The Red Sox will take it slowly with the 18-year-old left-hander before they let him get back on a mound.