Well, Jon Cooper's time as the Vikings' #2 center was, apparently, short-lived, as the Beloved Purple have signed offensive lineman Kory Lichtensteiger to a contract and released the former Sooner.

Lichtensteiger was a fourth-round pick of the Denver Broncos in the 2008 draft, having played his college ball at Bowling Green.  According to Vikings.com, Lichtensteiger played both guard and center for the Falcons, and was named to the All-MAC and Academic All-MAC teams as a senior.  He was also a finalist for the Rimington Trophy, which is given to the best center in college football, and a semi-finalist for the Draddy Trophy, which is considered by many to be the "Academic Heisman."

In addition, as Anthony has already pointed out, the Vikings named their eight-man practice squad.  Ian Johnson surprisingly made it through waivers, as did John David Booty.  Here's the entire group.

S Colt Anderson
QB John David Booty
OT Chris Clark
RB Ian Johnson
DT Tremaine Johnson
TE Garrett Mills
WR Nick Moore
OL Drew Radovich