"With Matt, it was never good enough," Mularkey said. "Even when it was good, it wasn't good enough. I think he (Gabbert) wants to be good. It's important to him."
Gabbert, whom the Jaguars selected 10th overall in the 2011 draft, struggled throughout his rookie season and oftentimes looked overwhelmed against NFL defenses. Gabbert completed only 50.8 percent of his passes and threw 12 touchdowns to 11 interceptions in his 14 starts.
"I don't want to get into the things that took place last year, but (I think) there were things in his head even before the ball was snapped," Mularkey said. "He knew there may be a chance the rush could get to him for a variety of reasons. I don't want to step on any toes, but I've got to get that out of his head."
When assessing Gabbert's abilities, however, Mularkey didn't sound like a coach who viewed Gabbert as a lost cause.
"He's got a strong arm. He can move out of the pocket. He's intelligent, (can operate) the no huddle," Mularkey said. "I think he can do a lot of things for us. And I think the guy wants to be coached. You can tell some quarterbacks think they know it all. I don't have that feeling (about Gabbert)."