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Jeff Hanisch-USA TODAY Sports

Currently, the right tackle position in Chicago is a big question mark.

The Bears used Pro Bowl guard Kyle Long at right tackle earlier this offseason, according to Brad Biggs of the Chicago Tribune, but head coach John Fox said Long is still a guard.

“Right now he’s a starting guard, and we’re out here trying to get better as a team, learn a new system," Fox said in June, according to Biggs. "We had a shortage of tackles right now. We have a couple of guys in the training room. So we took a look at him there.”

It makes sense to move Long outside to right tackle because of his combination of strength and athleticism, but he has gone to two straight Pro Bowls as a guard. If the Bears opt to keep Long at guard, the battle for the starting right tackle job will be something to keep an eye on in training camp.

Jordan Mills started all 16 games at right tackle in 2013 and 13 games at right tackle last season, but he struggled in pass protection.

According to Pro Football Focus, between 2013 and 2014, Mills gave up a total of nine sacks, 19 quarterback hits and 93 quarterback hurries. He finished the 2013 season with a minus-36.2 overall grade, and last season, he finished with a minus-15.7 grade.

He is serviceable in the running game, but he has been a liability in pass protection the last two seasons. Mills sits atop the depth chart at right tackle because of his experience, but he will have to earn the job over guys like Michael Ola, Charles Leno and Tayo Fabuluje this summer.

Ola made starts all over the offensive line last season, including three starts at right tackle. According to Pro Football Focus, Ola allowed just one quarterback hit, six quarterback hurries and no sacks in his 207 snaps at right tackle in 2014.

He also needs to improve in pass protection, but his athleticism makes him an upgrade over Mills.

The Bears selected Leno in the seventh round of the 2014 draft, and he appeared in five games last season and made one start. He is an athletic tackle who displays good footwork, but he needs to get stronger at the point of attack.

Fabuluje was taken in the sixth round of this year's draft, and the TCU product is too raw to claim a starting job this season. He is strong and powerful, but he needs to improve his mobility.

If Long is moved to right tackle, the focus will shift to the right guard position. But if he stays at guard, the right tackle battle will come down to Mills and Ola.