The deal is worth $17 million, according to FOX Sports.
Misi was entering the final year of his rookie deal. He is now signed through 2017.
Misi had 65 tackles, 3.5 sacks and two forced fumbles last year. For his career, he has 140 tackles, nine sacks and five pass deflections.
---The Dallas Cowboys placed defensive end Ben Bass on injured reserve Saturday.
Bass is out for the season with a separated shoulder he sustained in practice this week. Bass played in two games for the Cowboys last season.
The Cowboys re-signed defensive tackle Jerome Long to take Bass' roster spot. They waived Long on Aug. 31.
Long spent most of last season on the Kansas City Chiefs' practice squad. He was signed by the Jacksonville Jaguars late last season but was waived in the offseason. He was then signed by Dallas in June.
The Cowboys are thin at defensive line with starters Jay Ratliff (hernia) on the physically unable to perform list and Anthony Spencer (knee) doubtful for Sunday night's game against the New York Giants.
---The Oakland Raiders placed injured left tackle Jared Veldheer on the injured reserve-designated to return list on Saturday.
The team hopes that Veldheer, who had triceps surgery in August, can still play this season.
The Raiders also announced that they signed tackle Matt McCants from the practice squad. He was a sixth-round draft choice of the New York Giants in 2012.
Right tackle Khalif Barnes is moving over to left tackle for Sunday's season opener against the Indianapolis Colts. Second-round draft pick Menelik Watson is out with a knee injury.
---Free agent wide receiver Brandon Lloyd is planning to retire, according to CBS Sports' Jason LaCanfora.
Lloyd was let go by the New England Patriots after last season. Lloyd was a salary-cap casualty as he was due $3 million this season.
Lloyd started 15 of 16 games and had 74 catches for 911 yards with four touchdowns for New England in 2012, his only year with the Patriots.
He also played for the San Francisco 49ers (2003-05), Washington Redskins (2006-07), Chicago Bears (2008), Denver Broncos (2009-11) and St. Louis Rams (2011).
In 128 NFL games (88 starts), Lloyd has 385 receptions for 5,695 yards with 35 touchdowns.