Packers RT Bryan Bulaga is moving to the left side to be quarterback Aaron Rodgers' blind-side protector, replacing last year's starter Marshall Newhouse.
In addition, the coaches have flipped guards T.J. Lang and Josh Sitton, moving Lang from left to right and Sitton from right to left. Newhouse, 2012 undrafted free agent Don Barclay and 2011 first-round pick Derek Sherrod will all have a shot to start at right tackle.
Initially, multiple sources detailed the move, and later after an interview request, coach Mike McCarthy confirmed it and agreed to discuss it.
"I sat down with Bryan and Josh on Monday and I told them I wanted to make the move to where they're on the left side," McCarthy said. "Those two are our most accomplished and experienced players. I told them about the responsibilities and my expectations about playing the left side.
"Some of the things we'll want to get into schematically as we move forward. They were excited about it."
LT was a problem last season, and while Bulaga was a top 10 tackle in 2011 (at RT), he struggled at that position in 2012. Still, he should be an upgrade on Newhouse, so this is good news for Rodgers and his backside.