Drew Lock is only two games into his starting career and currently has a passer rating of 111.4. Drew Lock will have a bad game at some point. As sure as I am that the sun will rise tomorrow, it will happen.
Is there any way to know when? I turn to history to answer questions like this.
I only looked at starting QBs who began their starting careers this century. I then created a list to look at how every QB this century who has started at least 10 games played in their first five starts and in their next five starts (starts 6-10).