Chacin (toe) was reinstated from the 15-day injured list Friday.
Chacin spent just under a month on the injured list due to a toe injury, but he resumed facing hitters last week and will rejoin the Rockies ahead of Friday's series opener against the Giants. The right-hander struggled prior to his absence, posting a 10.80 ERA and 2.06 WHIP in 11.2 innings over his last nine appearances.