"I told my agency beforehand that if it got to the point where I was missing practice, there was no chance we were going to go on with it," the second-round pick told Mike Klis of 9News. "Missing anything else is not who I am."
Lock signed his deal on the eve of the first practice of camp and was present Thursday as the Broncos started work.
The Missouri product was said to be holding out for a "quarterback premium" in his rookie contract. However, Lock said Thursday that his agents had handled negotiations with the team, and that he didn't even know what the premium meant.
"I'm not 100 percent sure, but that's what they were talking about," he said. "When it was time to practice, the QB premium (that) I didn't know much about got thrown out the window."
The Broncos drafted Lock with the expectation he could eventually stabilize a quarterback situation that's been extremely shaky since Peyton Manning's retirement in 2016.