Stocker was signed to the active roster Thursday, Craig Peters of the Vikings' official site reports.
Stocker has been back and forth between the practice squad and active roster over the past few weeks. He appeared in the Vikings' Week 6 and Week 8 contests against the Panthers and Cowboys, respectively, playing a total of 26 snaps from scrimmage in those games and converting his only target into a seven-yard reception. With Ben Ellefson (foot/knee) placed on IR, it's likely Stocker will file in behind Tyler Conklin and Chris Herndon on the Vikings' tight end depth chart against the Ravens on Sunday.