GREEN BAY – Maybe this is the week Greg Jennings returns to action. Or maybe it isn’t.

The Green Bay Packers two-time Pro Bowl wide receiver has missed the past three games with the lingering groin injury he suffered in the Sept. 9 season opener against San Francisco, and while several players hinted after the Packers’ victory at St. Louis that there was a good chance Jennings could be back for this Sunday’s game against the Jacksonville Jaguars at Lambeau Field, an NFL source said Tuesday evening that Jennings was out of town Tuesday visiting a specialist to get another opinion on his injury.

Whether that means Jennings will be cleared to return to action or there is something more amiss with the groin than first thought is unclear. But it’s not out of the realm of possibility that Jennings, who has caught just 12 passes for 78 yards and a touchdown and hasn’t played since that TD reception against New Orleans on Sept. 30, could be sidelined until after the team’s bye week.

Jennings did not return a message Tuesday night.

The Packers face the Jaguars Sunday, then play host to the Arizona Cardinals on Nov. 4 before their bye on Nov. 11. Jennings has missed four games with his injury, and the team is 3-1 in those games.

With Jennings out, second-year man Randall Cobb has emerged as a major threat on offense, catching seven passes for 102 yards on Oct. 14 at Houston and catching eight passes for 89 yards and two touchdowns against St. Louis. Meanwhile, Jordy Nelson has put together back-to-back 100-yard games, with seven receptions for 121 yards and three touchdowns against the Texans and eight catches for 122 yards and a touchdown against the Rams..

“I think we’ve found a rhythm as an offense,” Nelson said Monday. "I don’t think it really is necessarily with or without (Jennings) because when he was playing we were struggling. (At) Seattle, we struggled. So I think as an offense we’re getting into a little bit of a rhythm. There’s still much we can do, still areas we can improve.”

“The plan with Greg just from Day 1 was to try to get as far into the week because with his type of injury, the fatigue, going through the testing and him maxing it out,” Packers coach Mike McCarthy said on Monday. “The fatigue part of it we felt sending him out for a bunch of practice was probably not in his best interest for the week he comes back.”

McCarthy said the plan for Jennings this week – if he is indeed going to return – would be for him to test the groin injury on Thursday, then practice on Friday if he is cleared by the medical staff for practice.