According to Football Outsiders’ pace statistics, the Carolina Panthers ran the league’s slowest offense in 2017. The 29.35 seconds they averaged between plays was over a second and a half longer than the league average.
There are two numbers that stand out in this chart- the Panthers’ pace in the second half and their pace when trailing by at least a touchdown. The Panthers are the slowest team in the league in both of these circumstances.
The slow pace of the second half coincides with the Panthers’ difficulty holding on to late leads.