1st and 10: the best passing combinations.(NFL)(National Football League)

Peyton Manning and Marvin Harrison are like an old married couple. With no more than a look or a hand gesture, each knows what the other is thinking. That rapport leads to defense-gashing route adjustments and makes them the best passing combination in the league. A look at Manning-to-Harrison and the rest of the league's top passing combos, as compiled by TSN correspondents:

About an hour before each game, Manning and Harrison meticulously go through the entire route "tree." Harrison runs ins, outs, slants, curls. Short routes, intermediate routes, deep routes. Manning delivers the ball, generally in stride, on each. That type of detailed work has been the foundation of their on-field relationship and has led to 655 completions and 8,697 yards. They are closing in quickly on NFL career records by a duo in both categories.

"They work all levels of the passing game," says one NFL pro personnel director. "I don't think anyone communicates as well as those two do in all phases of the throwing game."

The personnel director says another prolific pair, the Vikings' Daunte Culpepper and Randy Moss, has plenty of firepower but lacks the well-developed, all-around game of Manning-Harrison. "I think (Culpepper and Moss) probably are the best deep-ball combination, but I don't see all the intermediate stuff. It's more like, 'How fast can you run? How high can you jump? How far can I throw it?'"

2 Daunte Culpepper-Randy Moss, Vikings. Their "jump ball" might be the toughest play in the NFL to defend. Culpepper identifies one-on-one coverage and times his throw to Moss, who can outleap anyone. Culpepper can put the ball where only Moss can catch it, from as far as 60 yards out.

3 Donovan McNabb-Terrell Owens, Eagles. This duo has been everything the team hoped it would be when it acquired Owens. He has been the tough, physical receiver and big-play threat the Eagles had lacked. The pair developed timing by working at McNabb's Arizona home in the offseason.

4 Marc Bulger-Torry Holt, Rams. The two excel at connecting on deep "in" routes. Bulger also has improved at leading Holt, the Rams' top deep threat, on deep routes. Bulger occasionally throws a deep jump ball to Holt, who has the strength and excellent hands to come down with the ...