BOURBONNAIS, Ill. – Chicago Bears Pro Bowl right guard Kyle Long was spotted at the Olivet Nazarene University dining hall in a walking boot Thursday afternoon after he suffered a left calf injury near the end of the team’s first practice of training camp.

Long's timetable to return to the field is unknown.

Long, named to three consecutive Pro Bowls, is back at right guard after playing tackle in 2015. He'll line up next to veteran right tackle Bobby Massie, whom the Bears signed in free agency to allow Long to move back to guard.

Entering his fourth year in the NFL, Long is the unquestioned leader of Chicago’s offseason, a group that underwent several changes in the offseason.

“These practices are going to be really good for us,” Long said on Wednesday. “We’re out of our comfort zone; we’re not at Halas Hall. As you guys know, there’s a lot of new faces on this team, so this is their first time being down here at camp. It’s going to be hot, it’s going to be humid, that defense is going to be flying around, and I can tell you that right now. It won’t all be pretty, but this is where things get welded and things happen. That’s what training camp is for.”

The Bears’ next practice is scheduled for 11:15 a.m. CT on Friday.