Buckner and the Colts agreed to terms Monday on a two-year, $46 million contract extension, Adam Schefter of ESPN reports.
Buckner recorded six tackles (one solo) including a sack in Saturday's 23-19 loss versus the Texans.
Buckner finished Sunday's 23-20 win over the Raiders with four tackles (three solo), including one sack.
Buckner (back) did not practice Thursday but has no injury designation for Saturday's game against the Steelers.
Buckner had four total tackles, a sack, two tackles for a loss and two pass defensed in Sunday's win at Carolina.
Buckner (groin) is active for Sunday's game against the Rams, Kevin Bowen of 107.5 The Fan Indianapolis reports.
Buckner (groin) did not practice Thursday, James Boyd of The Athletic reports.
Buckner (undisclosed) is not practicing Wednesday, James Boyd of The Athletic reports.
Buckner had seven total tackles, a sack, two QB hits, a forced fumble and returned a fumble for a touchdown in Sunday's loss to Jacksonville.
Buckner left practice early Thursday to tend to a foot injury, James Boyd of The Athletic reports.