Dolphins Extend Koa Misi for 4 years

Per @AlexMarvez at Fox Sports, the Miami Dolphins have extended LB Koa Misi for 4 years.

I have to say that this is a little puzzling. Misi has just 105 tackles, 9 sacks, and no INTS in his 3 years with the team. He had a decent year in 2012 with 3.5 sacks and 3 forced fumbles.

UPDATE: @AlexMarvez at Fox Sports say's the contract is for 17 million in "new money".