Kai Forbath might not be available Sunday in Green Bay. (Jonathan Newton/The Washington Post)

The Washington Redskins were making contingency plans Friday to identify a possible replacement for place kicker Kai Forbath if one is needed Sunday in Green Bay.

Forbath suffered a groin injury Thursday, Redskins Coach Mike Shanahan said.

Shanahan said the Redskins will make a decision Saturday after evaluating Forbath.

Forbath was to be listed as questionable on the official injury report.

Shanahan called John Potter, who was with the Redskins in training camp, a possible replacement.

Update (3:53 p.m.)

The Redskins will bring in Potter and will have him on standby if Forbath can’t play. A decision is expected to be made Saturday.

Update (2:50 p.m.)

Shanahan said the Redskins had “a backup plan” in place if Forbath is unable to kick Sunday but did not specify what it is. Asked if Potter, who connected on a 63-yard field goal in one Redskins’ practice during training camp this summer in Richmond, would be a candidate to replace Forbath, Shanahan said: “Yes. We just don’t know where he’s at.”

As of early Friday afternoon, Potter’s agent said that he had not yet heard from the Redskins.

According to Shanahan, Forbath first complained of a sore groin Thursday.

“Yesterday I think he said his groin was a little bit sore,” Shanahan said. “He got a little treatment, didn’t think it was anything but [it was] a little bit more sore today. That’s why we have him listed as questionable.”

Saturday’s evaluation will include Forbath testing his injury with kicks, Shanahan said.

“He’ll kick, see how it feels,” Shanahan said. “Only he knows how it really feels. We’ll get some treatment today and kick him tomorrow and see where he’s at.”

The Redskins would have to make any addition to their roster by Saturday afternoon. They could take two kickers to Green Bay, evaluate Forbath again in pregame warm-ups and make a decision then, putting one kicker on the inactive list for the game. Shanahan said having a second kicker on the active game-day roster just to handle kickoffs is not an option.

Forbath was not immediately available to comment after the Redskins’ practice Friday. He missed a 40-yard field goal attempt during Monday night’s season-opening loss to the Philadelphia Eagles at FedEx Field. But he also sent several kickoffs into the end zone.

“I just kind of swung across my body instead of swinging up through the target,” Forbath said Thursday of Monday’s field-goal miss. “It’s very similar to a golf swing. If you slice it, you’re going to come down and across it. That’s the best way I can describe it. Just came down and chopped it. Shot right a little bit.”

Forbath made 17 of 18 field goal tries last season for the Redskins, connecting on his first 17 attempts before a miss in the regular season finale.