Landi, 23, was originally signed by Tampa Bay as a rookie free agent out of South Florida on April 29, 2013, but was released on June 4, 2013. The 6-foot-3, 236-pounder, played in 46 games at South Florida with 26 starts and finished his career with 72 receptions for 846 yards and three touchdowns. Landi played receiver and quarterback as well during his college career.
Vega, 26, was originally signed by the Patriots on Feb. 19, 2013. Vega is a native of Brockton, Mass., and played college football at Northeastern. The 6-foot-4, 255-pounder, played for the Winnipeg Blue Bombers of the Canadian Football League in 2011 and 2012, registering 66 tackles and 12 sacks in two seasons.