Burleson tweeted Saturday morning: "It is official so "Go Lions."
Media reports had the Lions agreeing to terms on a $25 million, five-year contract with Burleson on Friday, but the team wouldn't comment and his agent did not return a phone message.
Burleson caught 63 passes last season for the Seattle Seahawks and returned 30 punts.
The Lions will count on him to complement receiver Calvin Johnson and perhaps give their special teams a reliable returner.
The Lions have set an NFL record with just two victories in two seasons, including a winless 2008.