By Andrew Holleran The retirement scoreboard for Tom Brady and Rob Gronkowski now reads: Rob Gronkowski: 2Tom Brady: 1Gronkowski officially retired from the National Football League for a second time this week. Brady, of course, retired earlier this year, but opted to play another season. Gronkowski joked that Brady doesn’t like to lose… It’s tough to see Brady beating Gronkowski in this department, but he could tie him. Of course, it wouldn’t surprise anyone if Gronkowski comes out of retirement and plays another season in Tampa Bay, at least for the playoff stretch. So perhaps we’ll see Gr…