Birthdate: November 18, 1985
Height/Weight: 6'4"/308
College: California
College Position: LT
Starts and Games: 22 and 26
Notable: Gibson played two seasons at California after transferring from Solano Junior College. Gibson was the starting left tackle for the Bears for most of 2006 and 2007. The 2007 team allowed only 11 sacks, best in the Pac-10 and fourth overall in the nation. Gibson was an honorable all Pac-10, but not considered a great pro prospect.
He was however considered a pro prospect and was invited to the 2008 NFL scouting combine. There he benched 225 pounds 31 times and led all offensive linemen in the three cone drill. That, his build and his reputation as a "nasty" and "technically sound" blocker makes me think a little of Max Unger. Like Brandon Frye, Gibson came to the pros typecast a guard, but does give Seattle some left tackle depth.
The real question and the one not answerable from second hand information and stopwatches is how well does he move? As you might guess, youtube is bereft of Mike Gibson highlights, but here's a familiar face that played beside him: Justin Forsett. Gibson is 53.
And for a sense of his pass blocking:
Gibson strikes me as at least interesting.