Four years after the Bengals ship home Super Bowl quarterback Boomer Esiason to the Jets, the most popular player in franchise history returns today for a news conference announcing his two-year deal to back up Jeff Blake. All you need to know is that tomorrow is the sixth birthday of Gunnar Esiason, his son whose name adorns the Cystic Fibrosis and Lung Center at Children’s Hospital in Cincinnati. Today is about a lot more than football. Leave it to Norman Julius Esiason himself to sum up the irony two weeks shy of turning 36 after deciding to wait at least a year to head to the announcing booth since the NFL’s network deals have yet to be reached.