Dolphins signed G/C David Arkin. Arkin was signed off the Cowboys' practice squad. He'll take the suspended Richie Incognito's roster spot, but not his starting job. Arkin has never appeared in an NFL game. He's just a depth signing.

Cowboys waived G/C David Arkin. The No. 110 overall pick in the 2011 draft, Arkin never appeared in a regular-season NFL game. Frankly, it's surprising he lasted this long on the roster. Arkin has practice-squad eligibility, so he could resurface there.

ESPN Dallas believes Cowboys G/C David Arkin is "destined" to be a bust. Arkin, the No. 110 overall pick out of Missouri State in 2011, struggled with snapping the ball last summer, and he's been leapfrogged on the depth chart at guard by Ronald Leary. He's squarely on the roster bubble.