The Jacksonville Jaguars have announced that Cody Kessler will take over as starting quarterback from Blake Bortles.
The Jaguars also fired offensive coordinator Nathaniel Hackett on Monday.
"It's not a knee-jerk reaction," Marrone said. "I really feel like at the end of the day we've got to try to get better production out of our passing game or more consistent production in our passing game."
Per ESPN Stats & Information, Bortles' Total QBR of 49.0 ranks 25th among 31 qualified quarterbacks this season.
Kessler, whom the team acquired in a trade with the Cleveland Browns for a seventh-round pick in March, is 0-8 as a starter.