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.

Cowboys G/C David Arkin is struggling with snapping the ball.

C Phil Costa's primary backup for the time being, Arkin had never played center before this season. Per beat writer Brandon George, Arkin has "snapped several balls over the head of the quarterback and it's been a constant issue, even in walkthroughs." How Arkin fares in Monday's preseason opener could determine whether the Cowboys sign free agent C Jamaal Jackson. Even with a healthy Costa, center is a glaring weakness for Big D.

Cowboys coach Jason Garrett noted that OG David Arkin has shown "marked improvement" over his rookie season.

Coming from small-school Missouri State, Arkin concedes that "anchor strength" was a stumbling block as a rookie. The 2011 fourth-rounder is expected to battle Mackenzy Bernadeau (hip surgery) and impressive undrafted rookie Ronald Leary for the starting right guard job.

ESPN Dallas' Calvin Watkins projects 2011 fourth-round pick David Arkin as the Cowboys' Week 1 starter at right guard.

While it makes sense in light of Mackenzy Bernadeau's recent hip surgery, the projection is notable because the Cowboys' website has projected Arkin as a bubble player in training camp. Arkin has some intriguing tools, but the organization believed he "wasn't physically ready for the NFL" in 2011. The Cowboys' interior offensive line could be a trouble spot in 2012.

The Cowboys' official website feels that G David Arkin is not a lock for the 2012 roster.

The team's fourth-round pick a season ago was unable to deliver when given an opportunity to start, and ended up not playing a single snap in his rookie season. The Cowboys are expected add depth to the offensive line via the draft, which would put Arkin squarely on the roster bubble.

Owner Jerry Jones was "real impressed" by rookie LG David Arkin in Thursday's preseason opener.

Jones insists there would be no hesitation to start Arkin as well as rookie RT Tyron Smith up front in Week 1. The coaches like Arkin's tenacity and his ability to pull out on run blocks. He's battling veteran Montrae Holland (back) for the starting job.

Cowboys signed fourth-round T/G David Arkin to a four-year contract.

Arkin started 44 games at Missouri State, mostly at right guard before moving to left tackle for his senior year. In the pros, he'll play guard and maybe center.