Unbeknownst to the public until Tuesday, Green Bay Packers starting center Scott Wells suffered a setback on Monday in his recovery from a lower back or "trunk" issue as head coach Mike McCarthy likes to call it.

Wells appears to be out for at least the regular season opener against the Minnesota Vikings on Monday Night Football and possibly longer.

The setback has set about a chain reaction of events as the team has to deal with the loss of Wells.

First they had to juggle their starting lineup, which now looks like Jason Spitz will slide over to center while Tony Moll will step into the spot vacated by Spitz at right guard.

The Packers do have a modicum of experience with that particular lineup as it will the be same group of guys that started along the offensive line for the preseason finale against the Tennessee Titans. It's not like they were on the field together for any length of time, though. The first string was pulled after the one play that went for a touchdown.

The more pressing concern is the depth on the team. With Junius Coston now on injured reserve, the Packers don't have much of a center to turn to behind Spitz.

Daryn Colledge is the likely backup if the Packers don't make a roster move to rectify the situation. Colledge has taken some repetitions at practice as a center last year when Wells was also injured, but he has no game experience at the position.

Beyond Colledge, it's anybody's guess who else might a backup. Tony Moll has taken some snaps as a backup long snapper, but there's a world of difference between the two positions.

Undrafted rookie center Brennen Carvalho made the practice squad and could be a candidate to join the team in a desperate situation.

Muddying the situation further is that Josh Sitton is not around to provide any depth along the offensive line. It's possible that the Packers may go with only seven offensive linemen on their 45 man active roster on Monday. It all depends if they want to activate rookie tackle Breno Giacomini or not.

Photo credit: Mark Hoffman for the Journal Sentinel