FILE--Miami Dolphins quarterback Dan Marino looks for an open receiver in the second half against the Arizona Cardinals in this Sept. 19, 1999 photo at Pro Player Stadium in Miami. Marino, the most prolific passer in NFL history, will announce his retirement Monday, a source close to the quarterback said Friday, March 10, 2000. The Dolphins confirmed a news conference for Marino is planned Monday, March 13. (AP Photo/Tony Gutierrez)