What happened: Johnson announced Tuesday, Oct. 6 he would retire immediately to focus on mental health after 14 seasons in Philadelphia. The No. 4 overall pick in 2013 anchored the franchise's only two Super Bowl-winning teams and co-founded the OL Masterminds summit in 2018. Philadelphia managed 172 yards and went 0-for-12 on third down Sunday after Saquon Barkley exited in the first quarter with a hamstring injury.

Why it matters: Including the playoffs, Philadelphia went 122-63-1 with Lane Johnson in the lineup against 18-30 without him. Coach Nick Sirianni said Monday the offense lacks a defined identity while adjusting to a new scheme with nearly half the Week 1 starters sidelined. Johnson ranked second among tackles in pass-block win rate through four weeks, leaving the edge that steadied multiple quarterbacks and staffs vacant.

What to watch: Philadelphia must settle right tackle and clarify Barkley's status before the next game. The response will show whether the 2-2 offense finds an identity or drifts further from contention.