SANTA CLARA – Keion White lined up on the New England Patriots’ defensive line two months ago and gleaned a strong first impression of the rookie quarterback in his sights, Tennessee’s Cam Ward.

Earlier that week, the Titans had fired coach Brian Callahan after a 1-5 start, and even though the Patriots would cruise to a 31-13 win in that Oct. 19 visit to Tennessee, Ward looked “poised” in White’s eyes.

“It’s your rookie year, you’re the No. 1 pick overall, and you have a head coach who they fire. That’s not an easy situation,” White said. “So I’m impressed how he’s handling it and is still confident.”

Ward and the Titans (2-11) are coming to Levi’s Stadium on Sunday to take on the 49ers (9-4), who are refreshed from their bye and riding a three-game win streak.

The 49ers also own the N

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