Miami Dolphins' head coach Don Shula talks with quarterback Dan Marino during practice at the team's training facility in this Aug. 15, 1995 file photo, in Davie, Fla. 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/Hans Deryk)