Suddenly, the old guard looks rather old. Tom Brady, who wants to keep playing next season at age 43, was overshadowed on wild-card weekend by a QB who threw for just 72 yards. Drew Brees, who turns 41 this month, followed up what might have been his best season ever with a dud that featured his first multiple-turnover game of the season on a day he wasn’t even the best QB on his own team. Now…