Anthony Toribio
A three-time all-conference selection at Carson Newman, Toribio (6-1, 300) was signed by the Dolphins as an undrafted free agent on May 3, 2008.

Toribio has been on and off the Dolphins' practice squad since the beginning of the season, swapping places with cornerback Will Billingsley on multiple occasions. He was released most recently on Nov. 12.
Update: Toribio has since found a new gig, signing to the practice squad of the Green Bay Packers on Nov. 13.
Kirk Barton
A first-team All-Big Ten selection at Ohio State in 2007, Barton was drafted by the Chicago Bears in the seventh round (247th overall) of the 2008 NFL Draft. He made the team following the preseason and appeared in the regular season opener before being waived on Sept. 10.
The Dolphins claimed Barton off waivers the following day, releasing tight end Sean Ryan to make room. He was inactive every game he was on the team and was eventually waived by the team on Oct. 16 to make room for fullback Lousaka Polite.
Barton then joined the third team of his young career as he was claimed off waivers by the San Francisco 49ers. He spent two games inactive with the team before being waived on Nov. 9.
Barton cleared waivers and was signed to the Dolphins' practice squad on Nov. 12. He gives the Dolphins 12 the offensive linemen in the organization in addition to 10 on the active roster and one on I.R. Barton's old No. 76 is currently being worn by offensive tackle Brandon Frye.
Analysis
It seems after three different active roster stints, teams have finally figured out that Barton is simply not there yet and is practice squad material at the moment.
The fact that Barton has been on an active roster three times already but has yet to see much game action and has been released three times indicates that teams thought highly of him as a college prospect but he's simply not delivering in practice.
The addition of Barton is of minimal impact. He's familiar with the offense and was a strong college player who has potential, but he's clearly not ready to contribute and might not even be the team's first choice if they needed to add a lineman due to injury.
As a practice squad player, Barton will receive a weekly salary of about $5,200. He has more experience at tackle but could be worked at guard, where he might be a better fit and where Miami has a bigger need.