Contreras (hamstring) took batting practice on the field at Fenway Park on Tuesday, Tim Healey of The Boston Globe reports.
Contreras is also expected to do some running on the field during Boston's series against the Angels that runs through Wednesday. It hasn't been determined yet whether Contreras needs a short rehab assignment before returning to the active roster. If he skips one, he could be activated as soon as Friday. Contreras has been out since late August with a left hamstring strain.