It was a rather topsy-turvy rookie campaign for Denver Broncos quarterback Drew Lock.

When the Broncos took Lock in the second round of the NFL Draft last spring, the general consensus was that Lock would ultimately usurp Joe Flacco as the starter at some point.

However, Lock was dealt some bad luck during the preseason, as he suffered a broken thumb and started the season on the injured reserve list.

He was finally activated late in the year and made his debut in Week 13, completing 18 of his 28 passes for 134 yards and a couple of touchdowns in a win over the Los Angeles Chargers.

In five starts overall, Lock threw for 1,020 yards, seven touchdowns and three interceptions while completing 64.1 percent of his passes and posting a passer rating of 89.7. Denver also went 4-1 in those games.

Now, it's the offseason, and Lock is preparing for a much bigger campaign in 2020 for the Broncos.

“I’ve already thrown three times and started to work out,” Lock said, according to Ryan O'Halloran of The Denver Post. “You think you want to take a break, but then it starts kicking in — ‘okay, I have to start moving around again. I have to get back to doing something.’”

Lock will also be spending some time learning from Peyton Manning, which he is looking forward to:

“I pretty much see him as a mentor,” Lock said. “He’s a guy that’s invested so much time in football and loves the game of football so much, what better brain to pick?”

The Broncos may finally have some stability at the quarterback position for the first time since Manning himself led Denver to a Super Bowl during the 2015-16 campaign.