Pats waive Moore, sign Martin, Rivera

The Patriots have waived second-year cornerback Sterling Moore, the team announced Wednesday.

In corresponding moves, the club has signed linebacker Mike Rivera and veteran defensive back Derrick Martin. The team already had an open roster spot after releasing linebacker Bobby Carpenter on Tuesday.

Also, the contract of practice squad tight end Alex Silvestro has been terminated.

Moore, a second-year player out of Southern Methodist, played in all eight games this season for the Patriots (0 starts). His most recent role was as the team's nickel back. In 2011, he appeared in six regular-season games for the Patriots (3 starts).

According to a league source, the Patriots worked out three veteran kickers -- Billy Cundiff, Neil Rackers and Graham Gano. The Patriots also worked out running back Lorenzo Booker, punters Chas Henry and Ryan Donahue, guard Ryan Durand, long snapper Bryce Davis and wide receiver Jarred Fayson.