AFC East

Mike Bianchi: Dan Marino should un-retire No. 13, give it to Tua Tagovailoa

The Miami Dolphins absolutely, positively should not un-retire Dan Marino’s No. 13 jersey and give it to their latest quarterback of the future — Tua Tagovailoa.The Dolphins shouldn’t have to.Marino, the greatest quarterback in franchise history, should insist that the Dolphins bring his number out of retirement so Tua can wear the cherished No. 13 he’s been wearing since his youth football days.Of course, Tua would never ask to wear No. 13 because he’s much too classy and humble for that. After the Dolphins took him with the fifth pick overall in the recently concluded NFL draft, Tua was aske…