The Niners faced a fourth-quarter deficit for the first time with Purdy as the starter, and nobody quite knew how he'd handle it.
Yet, as he's finished with the wide range of various tests, Purdy procured all the more excellent grades as the 49ers won a wild 37-34 shootout against the Pillagers.
It was San Francisco's ninth straight win, its longest such streak since an 11-game surge in 1997.
Purdy turned into the main newbie quarterback to win four straight beginnings since Ben Roethlisberger went 13-0 of every 2004.
Purdy finished 22-of-35 passing for 284 yards with two touchdowns and an interception for a 68.5 QBR.
Perhaps most impressive was what Purdy was able to do in the fourth quarter.
"I don't have to go in feeling like the weight of the world is on my shoulders and I have to perform or else," Purdy said.
"I've just got to go do my job. So, to have that kind of game, it was great to feel like that in the fourth quarter, the game is on the line and now we've got to go and put up points.