Brock Purdy is set to make his return from injury against the Arizona Cardinals on Sunday at State Farm Stadium, coach Kyle Shanahan told NBC Sports Bay Area’s Matt Maiocco .

Purdy’s initial return, in the 49ers’ Week 4 loss to the Jacksonville Jaguars , did not go well. He aggravated the toe injury that he suffered in San Francisco’s Week 1 win over the Seattle Seahawks .

Many viewed that first return after just two weeks of recovery as premature, including coach Kyle Shanahan .

Did Purdy think that his initial return was a mistake?

“No, going into that week, I felt good. I really did, and I thought I was going to be good to go,” Purdy said to reporters Thursday after practice. “I unfortunately got caught in a bad position with my toe again and just re-aggravated it.”

Purdy’

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