Another Mankato gem? Vikings sign former Mankato WR Shane Zylstra as an UDFA 😈 Brother of current Carolina Panthers WR Brandon Zylstra. The Vikings will use him as a TE. He can win consistently in jump ball situations and is a vertical threat! Should have a solid chance of making the team or practice squad, great upside! #minnesotavikings #vikingsfootball #udfa #nflfreeagency #nfloffseason #nflnews #nflfootball #skol #skolvikings #skolvikes #vikesverified #mankato