Answered April 22nd, 2019

Kurt Warner goes 24-30 with 390 yards & 4 TDs against San Diego, becoming just the second QB in NFL history to post a 158.3 passer rating in a game with 30+ attempts.

What is Kurt Warner's highest passer rating in a game with the Rams?
Interpreted as:
What is Kurt Warner's highest passer rating in a regular season game with the Rams?