TORONTO -- Defensive back Cassius Vaughn signed a two-year contract extension with the Toronto Argonauts on Monday.

The 30-year-old joined the Argos as a free agent last year.

"Cassius was a playmaker all season long for our defence and that was no more apparent than in the 105th Grey Cup," Argos general manager Jim Popp said in a written statement. "We're very happy to have him back in Toronto for two more years."

Before coming to Toronto, Vaughn was a member of the Hamilton Tiger-Cats, Baltimore Ravens, San Diego Chargers, Detroit Lions, Indianapolis Colts and Denver Broncos.

Defensive back Matt Black also extended his contract with the Argos by two years on Monday.

The 32-year-old has played 120 career CFL games, all as a member of the Argonauts.

The team also brought in two new players: wide receiver Jordan Westerkamp and linebacker Shakiel Randolph.

Westerkamp, 23, comes to Toronto from the University of Nebraska, where he played in 49 games for the Cornhuskers, starting 16.

The six-foot, 207-pound Illinois-native spent time with the Miami Dolphins following his time at Nebraska.

Randolph played 40 games in four seasons at Southern Methodist University as both a linebacker and defensive back.

After college, the six-foot-three, 213-pound Randolph spent time with the Washington Redskins and Kansas City Chiefs.