SANTA CLARA – Brock Purdy is done studying last Sunday’s three interceptions. Something even scarier is now in his line of sight: Myles Garrett.

He’s not just the Cleveland Browns’ ultimate quarterback chaser and annihilator. He leads the NFL with 18 sacks, five shy of breaking the single-season record.

“Obviously, he’s the best in the league with what he does,” Purdy said before the 49ers’ Wednesday practice. “You have to have a game plan ready for him, and more than anything, understand you can’t hold onto the ball too long.”

Purdy did precisely that too often in last Sunday’s 20-9 win over Carolina, and he blamed two of the three interceptions before halftime on an extra hitch that delayed throws.

If he gets ample time Sunday when the 49ers visit the Browns, that likely will be than

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