TAMPA, Fla. — There’s been almost no quit this year in Tom Brady, but if he does decide to retire for good this time, the Bucs’ 31-14 loss to the Cowboys in an NFC wildcard game may not have been a proper send-off for the seven- time Super Bowl winner. The greatest quarterback of all time wasn’t the best quarterback Monday night. That distinction belonged to Dak Prescott, who overcame his poor…