Red Sox manager Alex Cora said Tuesday that Grissom (hamstring) has begun some baseball activities, Gabrielle Starr of the Boston Herald reports.
The Red Sox haven't yet established a timetable for Grissom's return from the 10-day injured list, but certainly it's a good sign that he's increasing his activity level. Grissom is slashing a dreadful .148/.207/.160 this season and has been limited to 23 games due to injury.