The process of Peyton Manning attempting to find a new home is setting up what could be a significant domino effect across the NFL. We've heard about Alex Smith likely wanting to wait until Manning makes his decision, but it could conceivably go significantly beyond that. In his weekly Monday Morning Quarterback column, Peter King discussed the Peyton Manning dominos.

The most interesting domino related to the 49ers speculated what might happen to the 49ers if Peyton Manning ends up elsewhere and Alex Smith walks to Miami. Some of the speculation has Alex Smith prepared to return to SF if Manning does not come out to the Bay Area, but it is just that: speculation. There is still a legitimate possibility that the 49ers end up without either QB, opening the door for an assortment of options.

As King pointed out, if the 49ers do not land Manning and lose Smith, they have a sizable chunk of cap space. Any replacement quarterback is going to be at a replacement level price, whether it be Matt Hasselbeck, Josh Johnson, or conceivably rolling with Colin Kaepernick. Peter King speculates that the 49ers could climb into the Mike Wallace sweepstakes (a modest one thus far) if they end up without Manning or Smith. Adding Wallace would provide a monstrous weapon and create a pretty filthy wide receiver corps when you add in Michael Crabtree, Mario Manningham and Randy Moss. Oh, and Vernon Davis and Delanie Walker aren't too shabby.

That would not be the most shocking possibility, but that is also predicated on a situation that seems a little bit unlikely. Of course, everything about the last four days has been unpredictable, so we can't say anything with anything resembling confidence. Nothing like a little drama to start the week.