Thomas enjoyed several productive seasons with the Baltimore Ravens under Miami Defensive Coordinator Mike Nolan and New York Jets coach Rex Ryan, who is also believed to be interested in securing his signature.
However, his productivity declined in New England, and he was released this summer after three disappointing seasons with the Patriots.
The Dolphins are exploring their options following an injury to Channing Crowder, which will keep him out for an unspecified period of time. The injury to Crowder has not been diagnosed, and sources have suggested that Miami are considering placing him on the injured reserve list.
This would indicate that the Dolphins would be looking to play Thomas at inside linebacker, despite his previous experience at outside linebacker. It was also signals a departure from Miami's youth policy that saw the releases of Marques Douglas and Charles Grant, as Thomas is approaching his twilight years at 33 years of age.
Micah Johnson, claimed off the waivers from the New York Giants, was released earlier this week, meaning there is still a position to be filled at inside linebacker.
Thomas would relish the opportunity to continue playing in the AFC East, as he looks to put one over his former employers. He has previously said that he would love to face the Patriots twice a year, and show them what they are missing.
The New York Jets have also reportedly worked out Thomas, but NFL.com are reporting that they are unlikely to offer him a deal. However, Rex Ryan's interest in Thomas is well publicised, so any move for the linebacker could prevent the Jets from further strengthening.
It is unknown whether Thomas has the speed to adapt to a role as an inside linebacker considering his declining productivity over recent seasons, but he would offer great experience and is adamant that he still has plenty to offer prospective employers.
Thomas would also look to command a hefty paycheck, which may serve to scare off Miami. The Dolphins recently cut Jake Grove for monetary reasons, and have presided over the releases of Pat White, Patrick Turner, and Douglas Thomas in the past few weeks.
Furthermore, Crowder's injury status is still completely unknown; he may be placed on the injured reserve list, but it is still not known if he could return in a couple of weeks' time. The Dolphins may wait to see how Crowder's injury plays out before they make any moves in the market.
It is still unclear whether Miami will look to sign Thomas, but their interest in him appears to be genuine. The Dolphins may choose to turn to current linebackers Bobby Carpenter and Tim Dobbins if Crowder is unable to play, but Thomas is an alternative option they are currently exploring in the front office.