More on Kosier from ESPN insider: He is listed # 3 on their list of "sleeper" FAs, but he doesn't crack their "top 50" FAs list...
Kosier has average athletic ability, quickness and foot speed. He has good size but he lacks bulk and overall strength. He plays with excellent intensity, he has very good work ethic and he is tough and aggressive. He is a better run blocker than he is a pass protector but he is not exceptional at either one. He is a position blocker, he lacks good explosion off the ball and he struggle to get any movement at the point of attack. Although he takes decent angles off the ball, he struggles to get to the second level and he can not keep up with fast linebackers in this league. He could not finish a lot of his blocks. He is stiff in the hips, he lacks good change of direction skills and he does not have good balance or body control that you are looking for at the left tackle position. He is not a good space player and he was better working in a confined space at the OG position. He is not a natural knee bender, he plays to high, and he gets driven back and overpowered by bull rushers. He is slow in his pass sets and he could not get set or in position to block speed rusher. He did not use his hand effectively, rusher was able to get into his body and he would get beat with double moves. Overall, Kosier is a fill in player on a short period of time. He has some versatility in that he can play both guard and tackle positions and gives you some depth. But in the long run, he needs to improve his overall strength, bulk and consistency if he wants to take his game to the next level.
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