The ensuing 20 months have seen Romo doubled over in pain as often as he's reached the end zone.
If Parcells sees any similarities between a swiftly declining 2006 Bledsoe and the current version of Romo, he's not saying. In fact, Parcells recently expressed confidence that Romo will make a successful return later this season.
"I have a very long relationship with Tony. Actually, I just texted him the other night after I found out about it. Pretty extensive text," Parcells said in last week's interview with The Rich Eisen Show. "You know, I wouldn't count this guy out just yet. I mean I think when you're in your mid-30s and you've been hurt a couple years a row, those whispers all start. People doubt. They do those things and that's just human nature. Also, maybe his successor has arrived. We're not sure about that yet."
The Cowboys have opted to keep Romo on the 53-man roster to start the season, quieting rumblings that Prescott could seize control of the job with a strong six-game stretch.
Parcells, for one, remains firmly in Romo's corner.
"I don't underestimate this young man," Parcells said of his former pupil. "He's got rare toughness, and I know he's going to make an effort to get better."
It will be interesting to gauge how much of the near-MVP form Romo retains when he returns to the lineup in late October or early November.