"Listen, I think I've got a lot left in the tank," the former Baltimore Ravens quarterback said Thursday, according to ESPN's Jeff Legwold. "And I feel like I can do a lot more than I've shown in my 11-year career. I'm excited about that."
Flacco never quite lived up to expectations in Baltimore following his magical Super Bowl run during the 2012 season. Prior to that, he was peppered with annual questions about whether he was good enough to win a championship.
In March, Flacco was jettisoned to the Broncos for a fourth-round pick. The veteran led his new team into practice Thursday as Denver commenced training camp.
"There is an energy about coming here and an excitement that I feel being with this new team and getting another chance of being a starting quarterback," Flacco said. "I don't think you can ever take that for granted ... I'm definitely excited about it."
The 34-year-old began last season as the Ravens' starter, but eventually surrendered the spot to rookie Lamar Jackson.
If nothing else, the veteran has already secured the support of the Broncos' top pass-catcher.
"Flacco's a baller," wide receiver Emmanuel Sanders said. "I think we're going to be OK. I like the way he spins it. ... I call him, 'Pretty Boy' Flacco. That's his name. He's just smooth."
Flacco posted a passer rating of 84.2 in nine games last season, nearly identical to his career rating of 84.1.