According to Vikings.com, the Minnesota Vikings announced they signed 9 players to the Viking practice squad and one of the players is Former Duluth Denfeld player CJ Ham, and German import WR Moritz Böhringer.

From Vikings.com here is the list of players signed to the squad:

G Willie Beavers
WR Moritz Böhringer
TE Kyle Carter
G Isame Faciane
RB C.J. Ham
DT Toby Johnson
CB Tre Roberson
QB Joel Stave
DE Stephen Weatherly