MIAMI, UNITED STATES:  The file photo shows Miami Dolphins quarterback Dan Marino as he drops back to pass against the San Diego Chargers 19 December 1999 at Pro Player Stadium in Miami, Florida. The 17 year veteran of the Dolphins is expected to announce his retirement at a press conference 13 March 2000 at the Dolphins training facility in Davie, Florida.  AFP PHOTO/ Rhona WISE (Photo credit should read RHONA WISE/AFP via Getty Images)