Melancon (elbow) was activated from the 10-day disabled list Wednesday, Alec Pavlovic of NBC Sports Bay Area reports.
With Derek Law working in relief four of the past five games, the Giants opted to bring back their primary closer to aid the back end of the bullpen. Melancon should resume his normal role closing out games for San Francisco. To make room for him on the active roster, Kelby Tomlinson was sent back to the minors.