Joe Flacco has never lived up to the promise, deserved or not, associated with the Baltimore Ravens' victory in Super Bowl XLVII. But well over a half decade removed from that triumph and playing for another team for the first time in his career, the veteran signal-caller seems more confident in his abilities than ever.

After his first official practice as a member of the Denver Broncos on Thursday, Flacco not only claimed he has “a lot left in the tank,” but even suggested his best days as a starting quarterback are ahead of him.

“Yeah, there's no doubt [I've got something to prove],” he said, per ESPN's Jeff Legwold. “Listen, I think I've got a lot left in the tank. And I feel like I can do a lot more than I've shown in my 11-year career. I'm excited about that.”

Denver agreed to trade a mid-round pick to the Baltimore Ravens in exchange for Flacco on February 13.

The 11-year veteran lost his longtime job as Baltimore’s starter midway through 2018, when rookie first-rounder Lamar Jackson replaced him as a starter due to injury and ultimately was named the team’s full-time starter. In nine games last season, Flacco threw for 2,465 yards, 12 touchdowns, and six interceptions while completing 61.2 percent of his passes. He was sacked 16 times, and averaged just 6.5 yards per attempt.

Flacco, 34, has made it clear just how happy he is to be playing in Denver since the trade, and his teammates certainly seem happy to have him. Regardless, it would come as a major surprise if he played the best football of his career with the Broncos.