Injuries have limited Gonzalez to just 11 games over the past three seasons, including eight last season.
The Colts drafted Gonzalez with the last pick in the first round in 2007, but the former Ohio State product has caught just five passes since 2008.
In his first two seasons in Indianapolis, Gonzalez played in 29 games, making 11 starts. In 2008, he had a career-high 57 catches for 664 yards and four touchdowns.
At 6 feet, 193 pounds, the 27-year-old Gonzalez was considered a top slot receiver coming out of college.
Scott was a sixth-round pick out of the University at Buffalo in 2008, and has played in 58 games in four seasons.
He totaled 12 sacks and 67 tackles over his first two seasons in Oakland, seeing time mostly as a defensive end in the Raiders' 4-3 defense. However, against the Cowboys on Thanksgiving in 2009, Scott made his first career start at outside linebacker in Oakland's 4-3 scheme, recording three tackles for a loss, two sacks and three quarterback hurries.
Scott (6-5, 255) started the first 10 games of the 2010 season at defensive end before suffering a season-ending knee injury. In 2011, he returned to play in 16 games, totaling seven tackles, and earning Oakland's Ed Block Courage Award.
He had nine special teams tackles in 2008, second on the Raiders.
Information from ESPNBoston.com's Mike Rodak contributed to this report.