Wood (hamstring) was activated Friday from the 15-day injured list, Danny Emerman of KNBR 680 San Francisco reports.
The left-hander will likely serve as the bulk reliever behind opener John Brebbia on Friday night against the Diamondbacks before settling back into more of a regular rotation role next week. Wood threw only 46 pitches in his lone rehab start Sunday at Triple-A Sacramento. He's been out since April 19 with a left hamstring strain.