I wouldn't count on a lot of INTs by Leftwich or turnovers in general by the Jags. They were 2nd in the league last year in fewest turnovers with 17 and Leftwich only threw 5 INTs. Compare that with Dallas who ranked 24th giving up 31 turnovers including 17 INTs by Bledsoe.
Also, Zimmer's defenses do not produce many turnovers so I wouldn't count on a lot of forced mistakes by our defense in this game. We were minus-5 last year while the Jags were plus-11, so I would expect to see more mistakes by our team than theirs, although I hope it is the other way around.
I would love to see us pressure Leftiwch relentlesly, getting several sacks and forcing a bunch of mistakes and turnovers but Zimmer's defensive style isn't like that, never has been and likely never will be regardless of who he has on the team.