Well, it doesn't appear as though Mike Zimmer has to concern himself with what Chris Cook puts on social media any longer.
On Friday, Cook signed a one-year deal with the San Francisco 49ers. Cook was the Vikings' first overall selection in 2010 (#34 overall after the Vikings traded out of Round One that year), and had what can charitably be called an up-and-down career with the Vikings. In four years, he appeared in 34 out of a possible 64 games, missing time due to a litany of injuries and a paid suspension following a domestic violence incident with his then-girlfriend in 2011.
Cook showed some decent ability when he was a member of the Vikings, matching up particularly well on a couple of occasions with Calvin Johnson. However, he was also credited by Pro Football Focus as giving up the most touchdown passes in a secondary that led the league in that category. (I'm not sure if "credited" is the right word there, but it's better than anything else I can come up with right now.)
We'll have to see exactly what happens with Cook in San Francisco, as he's going to have to fight for a spot on one of the league's better defenses. If he can stay healthy, he's got a chance to contribute to Jim Harbaugh's team.
Our friends at Niners Nation have more on this signing.