"It's his job," Bowles said.
Fitzpatrick put up one of the best seasons in franchise history in 2015 throwing 31 touchdown passes. That production after he filled in following the infamous Smith punch debacle led to a summer of back-and-forth over Fitzpatrick's worth.
The sides finally found middle ground Wednesday night, the eve of training camp, agreeing to a $12 million deal.
Fitzpatrick said he was comfortable with a one-year deal, despite the lack of security.
"I would much rather pass up on some of that guaranteed money ... and bet on myself and just see what happens," he said.
On Thursday, Fitzpatrick was back on the field with teammates. Reporters noted during practice that Fitzpatrick got the majority of first-team reps, but shared part of the duty with Smith.
"Geno's here at No. 2 right now unless Bryce and Hack have some great gain, if they come along like gangbusters," Bowles said. "No. 2 right now, it's open. If Fitz has some setbacks ... something else. Geno's one, I mean Fitz is one, Geno's two, Bryce is three, Hack is four."
"I have something to prove every year," Fitzpatrick said.