The terms of the deal are for three years and $17 million.
Browner, and Darelle Revis, who was signed from the Tampa Bay Buccaneers, will join forces to replace Aqib Talib who signed with the Denver Broncos.
The Patriots will not have Browner in their lineup right away however. That is because he was suspended for the first four games of the 2014 National Football League season in December for violating the league's substance abuse policy.
Browner played for the Stampeders from 2007-2010 and was a Canadian Football League all-star for his final three years in Calgary.
He joins a Patriots team that has dominated the AFC East over the last decade. The Patriots have won their division in 11 of the last 13 years and won the Super Bowl in 2001, 2003 and 2004.