Chaisson (undisclosed) did not participate in Tuesday's practice, John Keim of ESPN.com reports.
Chaisson is sitting out with an undisclosed issue. It is unclear when the starting strongside linebacker suffered the issue, as neither he nor the recently injured Odafe Oweh (undisclosed) participated in last Friday's preseason opener against the Dolphins. With both primary outside linebackers down for an indeterminate amount of time, Joshua Josephs, Javontae Jean-Baptiste and Drake Jackson should see increased first-team reps.