Iffy offensive line counting on Pace, Williams

Getting back to our position-by-position breakdowns as we move closer to the first practice at Olivet Nazarene, we move to the offensive line. The skinny: The Bears are reshaping their offensive line for the second consecutive year after using the same five for the three previous seasons. They're set to open with their third left tackle, Orlando Pace, and third right tackle, Chris Williams, in as many seasons.