Here is the bottom for passer rating this season. I'd argue that rookie Rattler essentially matching the more experienced Jones, Young, Ridder, Huntly, and Brissett suggests he looked like a #2.
W. Levis - 539
D. Jones - 2,241
D. Watson - 2,305
J. Brissett - 1,759
T. Huntley - 408
D. Ridder - 586
B. Young - 823
M. Jones - 1,477
T. Boyle - 233
A. Richardson - 337
D. Lock - 876
Average - 1,053
S. Rattler - 120
I'm not entirely sure that you're even serious, but if you are, congratulations on making a solid point that Rattler has played about as well in his first 120 throws as a group of multi-year starters, high draft picks, and experienced backups with an average of 8.5x more throws under their belts...