Lock, who talked to TMZ after arriving at Los Angeles International Airport, didn't want to specifically address Flacco's remark but said he's learning from his teammate.
"He's taught me a lot so far," Lock told TMZ. "He's dealing with winning football games, I'm dealing with trying to learn. ... We're in the same quarterback room. He's been great to me."
Lock later expounded on those comments in an interview with The Associated Press.
"Me and Joe talk out on the field, talk over things in the QB room. I mean, it's hard even to think about how couldn't I learn from the guy when we're in the same QB room every day and on the same field every day and I get to watch his reps, I get to hear the playcalls he's running in my head through the helmet," he told the AP. "I think it was just mainly him stating that, yeah, I do have a young quarterback underneath me right now but don't forget that I'm here to win football games.
"And he thinks that he can do that and so do I.''
Lock told the AP he'll pepper his position coach and offensive coordinator with questions, and "when I've asked Joe a question, it's not like he turns a cold shoulder and doesn't talk to me. He answers and we talk about things. So, I'm appreciative of what he's done.''
Flacco, acquired from Baltimore in March, said earlier Monday that he's "not worried about developing guys or any of that. That is what it is. I hope he does it well. I don't look at that as my job. My job is to go win football games for this football team."
Denver's 9News reported that John Elway, the Broncos' president of football operations/general manager, liked that Flacco was more focused on winning than tutoring Lock.
"We've taken worse hits," he joked to TMZ.
The Associated Press contributed to this report.