The Vikings signed Dallas to the practice squad and elevated him to the active roster Saturday.
The 49ers activated Kirk (calf) from injured reserve and removed his questionable designation for Sunday's game in Atlanta.
The Vikings activated Mason (thumb) from injured reserve Saturday, and he does not carry an injury designation into Sunday's game against the Colts.
Wallow (hamstring) has been ruled out for Sunday's game against Atlanta.
Gifford (groin) has been ruled out for Sunday's game against the Falcons.
Darrisaw (concussion) does not have any injury designation ahead of Sunday's game against the Colts, Craig Peters of the Vikings' official site reports.
Williams (knee) does not have any injury designation ahead of Sunday's game against the Falcons.
Dugger (knee) does not have any injury designation ahead of Sunday's game against the Falcons.
Sigle (ankle) has been ruled out ahead of Sunday's game against the Falcons.
Watkins could take on a significant role Sunday against Atlanta with Mike Evans (Achilles) and Deebo Samuel (hamstring) both sidelined, Brooke Evans of the 49ers' official site reports.
