"I say that because a lot of times ego gets too involved when it comes to being in Washington," McNabb said Thursday on ESPN's First Take.

"Here's a guy coming out who's very talented, mobile, strong arm, we've already heard he's intelligent -- football mind. Are you going to cater the offense around his talents and what he's able to do? Or are you going to bring the Houston offense with Matt Schaub over to him and have him kind of be imbedded in that?"

Kyle Shanahan, son of Mike and Redskins offensive coordinator, formerly was offensive coordinator in Houston with Schaub at quarterback.

"We talk so much about Mike Shanahan and the things he was able to do in Denver (as Broncos head coach). Well, I have a couple of names for you ... quarterbacks that he's coached and the lack of success that he's had."

Shanahan won two Super Bowls with John Elway at quarterback in Denver. But McNabb mentioned John Beck and Rex Grossman (both in Washington) and Jay Cutler, Jake Plummer and Brian Griese (all in Denver).

McNabb described Plummer as a "guy who had success, led them (the Broncos) to the AFC championship against Pittsburgh ... and then (Shanahan) benched him the next year because he wouldn't do what he wanted him to do.''

McNabb said he has questions about what kind of offense Washington would run with Griffin, the Heisman Trophy winner from Baylor.

"Is it the spread offense that you try to continue to (have) flourish that he's been successful in? Or are you just going to have him in a foxhole with a makeshift offensive line, (and) you keep bringing in receivers," said McNabb. "What are we going to see?. I don't think it's a great fit. I think the D.C. fan base will support RG3 because they love the acquisition. .... But if this doesn't work this year, if we don't see a splash like a Cam Newton splash (as a rookie last season with the Carolina Panthers) this could be it."