The Bears did not offer Slauson, who saw time at center last season in addition to guard, a chance to return with a pay reduction.
The Bills view Slauson as a potential option at right tackle, a source said. Buffalo has uncertainty at the position after starting right tackle Seantrel Henderson missed the final five games of last season with an undisclosed illness. The Buffalo News reported that Henderson was diagnosed with Crohn’s Disease.
"We won’t have a definite decision on [Henderson’s] health status, but we look at it this way: we finished the year with [backups] Jordan Mills and Cyrus Kouandjio and we still were the No. 1 rushing team and the No. 1 rushing-per-average-attempt team," Bills general manager Doug Whaley said last month. "So we feel that we can continue that."
Slauson, 30, has a background with Bills coach Rex Ryan, having played for the New York Jets from 2009-2012. He also played for Bills' offensive line coach Aaron Kromer with the Chicago Bears from 2013-2014.
The Chargers are looking at Slauson as a potential center, although the team added former USC center Max Tuerk in the third round of last week’s draft.
Slauson started all 16 games last season for the Bears, 12 at left guard and four at center, and has made 85 starts over his seven-year NFL career.