The Giants activated Gray (knee) from the reserve/PUP list Saturday, Dan Salomone of the Giants' official site reports.
Gray was able to practice in full all week. This activation was the last step in the 26-year-old's ability to suit up for the Giants' Week 12 matchup versus the Lions. The third-year pro will likely see depth running back duties behind both Devin Singletary and Tyrone Tracy, assuming Gray is active.