Green Bay Packers fans are worrying about whether or not Aaron Rodgers is going to show up to training camp. But could the superstar QB be hurtling towards a shock retirement?

That's what the big shots of the gambling world are bracing for as we head towards the start of camp. Aaron Rodgers has been frosty about communicating with Packers brass, and insiders within major sportsbooks have the “expectation” that the reigning NFL MVP could hang up his cleats.

Via Packers Central reporter Bill Huber:

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Las Vegas sportsbooks are preparing for Aaron Rodgers to retire and not return to the Green Bay Packers.

Because of the importance of the reigning NFL MVP, Westgate SuperBook recently closed all its NFC North markets, including projected wins, playoff odds, divisional odds and weekly lines for the four division teams, one oddsmaker at the sportsbook said via a Twitter direct message.

Two other sportsbooks contacted after that initial message said the expectation is Rodgers is going to announce his retirement sometime before the Packers' first practice on Wednesday.

Is this reality? Not even a year ago we were seeing Aaron Rodgers dominate the NFL and contend for the Super Bowl trophy. To even be discussing the remote possibility of his retirement is just stunning. Buckle up, Packers fans. The next few weeks are going to be wild, one way or another.