He's done the AFC rounds, including two stints with Dolphins. The Patriots had previously ditched him and brought out of retirement a veteran OL coach/scout and now he's again no longer a Dolphin.
The entire league is struggling with good OL play, with few exceptions. Coaching and consistency have to take greater place than talent in that case. Spend some $$$ on the best OL and strength coaches we can get. Hire a rugby tackling consultant like the Shehacks did too while your at it.