I found the information I was looking for. From an article on ESPN.com.
Notable is that Parker and Ravens general manager Ozzie Newsome have a very close professional relationship.
However, the Ravens, whose defensive backs are the weak link in one of the league's best defenses, would have to compensate the Chargers if Sanders indeed decides to play for a 13th season.
That must've been at least a 4 of 5 year deal that Snyder signed Sanders to back in 2000. He played in 2000, and retired shortly before training camp in 2001. Talked of a comeback with the Raiders in 2002, and wanted to be considered for the Atlanta Falcons coaching job in 2003. The guy is in the news every year. Ravens Interested In Sanders