— Philadelphia Eagles (@Eagles) November 20, 2015
Couplin, 24, is in the second year of his three-year, $1.53 million rookie contract and stands to make base salaries of $510,000 and $600,000 over the final two years of the agreement.
His 2015 season ends with him recording five tackles over the course of eight games for the Eagles.
Reynolds, 24, is a former fifth-round pick of the Eagles back in May of last year. He was unable to make the 53-man roster coming out of the preseason, but was later signed to their practice squad.
Reynolds has yet to appear in an NFL game.