Griping about the play of their quarterbacks has become almost as common among fans of the Jacksonville Jaguars as griping about the heat and humidity this time of year.

All it took Thursday was the sight of Blaine Gabbert throwing the ball out of bounds while rolling out to his right to get some diehards in attendance at the final day of minicamp plenty hot and bothered.

Gus Bradley knows that his patience and relentlessly upbeat demeanor will be tested at times by Gabbert, Chad Henne and every other quarterback the Jaguars will bring to training camp next month. He’s hardly the first head coach to have experienced those feelings. The thing that matters most to him is how the person entrusted with running the offense can respond to adversity. Both Gabbert and Henne got far too much practice at that a year ago when the Jaguars stumbled their way to a 2-14 record, the worst in franchise history.

“That’s what I talked to our quarterbacks about: Demonstrate belief to us,” Bradley said. “If you do something, if you make a mistake, those things happen. What we’re looking for more is how you bounce back.”

Gabbert, who has thrown 17 interceptions and been sacked 62 times in 25 regular-season games, spent more time Thursday working with the first-string offensive line than Henne did. Based on that, he would appear to have the inside track on the starting position.

But with the Jaguars going on their third offensive coordinator in as many years in Jedd Finch, Gabbert is taking nothing for granted.

“I wasn’t the first quarterback to have that happen to,” he said. “And I won’t be the last.”

Henne started the final six games of last season after a shoulder injury to Gabbert. Bradley and general manager Dave Caldwell have made repeated references over the past five months to open competition, and Henne is taking their word for it.

“The coaches haven’t said anything to us,” he said, “so if they don’t say anything, I feel like I’m in the running. Obviously it’s their decision in the end who they feel comfortable with, but for me, it’s just give them every hope I can do it and lead this team.”

Behind Gabbert and Henne are Mike Kafka, who was claimed off waivers Tuesday from the New England Patriots, and rookie free agent Matt Scott. Another undrafted rookie, Jordan Rodgers, was at minicamp but unable to practice because he is coming off groin surgery.

Kafka became available after the Patriots signed Tim Tebow, whose every move since the Jaguars bypassed him in the first round of the 2010 NFL draft has been scrutinized in his hometown. But there is too much for Kafka to do in terms of understanding Finch’s system of attacking the defense and simply getting better for him to dwell on anything Tebow-related.

“None of that matters now,” he said. “My head’s right here.”

Should Kafka, Scott and Rodgers all be brought to camp with Gabbert and Henne, the Jaguars would join the Philadelphia Eagles as the only teams with five quarterbacks on their roster.