Arizona’s Kyler Murray looking at home in the pocket while 49ers’ Brock Purdy is running to daylight

SANTA CLARA — Brock Purdy is running more, Kyler Murray is running less and it’s been beneficial for both the 49ers and Arizona Cardinals.

Purdy will never rush for 833 yards in a season as Murray did in 2020. Nor is Murray being asked to be Purdy. Yet each is ascending because their playing styles are adding the strengths possessed by the other while at the same time refining what they do best.

Through four games, Purdy has run the ball 18 times for 75 yards and eight first downs for the 49ers (2-2).