The Patriots have brought back CB Marquise Cole and have released OG Josh Kline.
DB Cole was a casualty of waivers as the Patriots needed a veteran to release. Cole has over four years of accrued experience so he became a free agent and wasn't subject to waivers, like a rookie would have been. Cole likely had an understanding with the office that they would bring him back soon after his release. He is a core special teamer and provides depth at nickelback (likely third string behind Kyle Arrington and Logan Ryan), as well as at safety. He's been regarded as a great locker room presence and it's good to have him back.
OG Kline was an undrafted free agent who had made it to the 53 because of his position. He played the most preseason snaps for the Patriots at the right guard position which is a spot of need. A former wrestler, Kline must have evoked some memories of RG Stephen Neal and Dante Scarnecchia had to see potential. Due to the injuries at right guard during the off-season (Dan Connolly, Marcus Cannon, Tyronne Green, Markus Zusevics, Will Svitek), Kline's reps were likely the main reason for him sticking around. Once the Patriots brought in some more regarded linemen (notably OG Chris Barker), Kline became expendable. Look for him to find his way to the practice squad.