What happened: Philadelphia kicked short with eight seconds left and Jacksonville out of timeouts in London. Sirianni said the call should have been a kickoff into the end zone for a touchback at the 35. The opening kickoff went 90 yards for a Jaguars touchdown before offsetting penalties wiped it out.

Why it matters: The admission concedes Philadelphia could not trust its coverage unit to make a tackle. Former Steelers coach Mike Tomlin said coaches must rely on back-end roster players on special teams. Keeping retired tackle Lane Johnson on the 53-man roster leaves one fewer spot for coverage help.

What to watch: Philadelphia's next kickoff decisions and coverage personnel carry added scrutiny. The final special-teams roster spots are the near-term pressure point.