Not a rematch trend as you requested but still a good one. In NFL games where the line is 9.5 or higher, take the under. It is smashing.
9-2 this season
Last 7 years of sample size the under with this scenario is hitting at a 62% rate
Reasoning is that when the spread is largethe favorite will get out to a lead and start grinding clock, or if the dog is able to keep the game close it typically means its a street fight kind of game. Rarely do these games turn into shootouts from both teams.
Jags are +9.5 in some cases still (most places look like its +9) so I would say the same general principle applies here. Take the under 53