Key receiver injured

Cal sophomore receiver Demetris Robertson missed Saturday night’s game against Ole Miss with an undisclosed injury.

The 6-foot, 190-pound speedster had seven catches for 70 yards and two carries for 40 yards and a touchdown in the Bears’ 2-0 start, a year after earning Freshman All-America honors with 50 catches for 767 yards and seven touchdowns.

University officials expect to update Robertson’s condition Monday.

Shades of Johnny Football: When Cal defensive coordinator Tim DeRuyter flipped on the tape this week of Ole Miss quarterback Shea Patterson, it instantly shuttled him back to six years ago.

DeRuyter was the defensive coordinator at Texas A&M in

2011, when his unit practiced daily against scout-team quarterback Johnny Manziel.

“The first time I saw (Patterson), I thought I was looking at Johnny Football again,” DeRuyter said before Saturday night’s game. “I was thinking, ‘Oh, crap. Here we go again.’ ”

Cal scout-team quarterback Brandon McIlwain did his best during the week to mimic Patterson, who is a verified escape artist and entered the game leading the nation in passing yards per game (459.0) and tied for No. 1 with UCLA’s Josh Rosen for passing touchdowns (nine).

But nothing could prepare

the Bears for the real thing. Patterson went 14-of-19 for 267 yards and two touchdowns in giving Ole Miss a 16-7 halftime lead.

“If he gets out on the edge and extends plays, that’s where the explosive plays happen,” DeRuyter said. “As much as possible, we’re going to try to keep him from doing that, realizing that it won’t be perfect. Nobody has been.”

Waldorf exhibit: In celebration of the 70th anniversary of Pappy Waldorf taking over the Bears’ football program, Cal has unveiled two 50-foot display cases at Memorial Stadium. One is dedicated to Waldorf, who went 67-32-4 and took Cal to three Rose Bowls, and the other is focused on his players, 12 of whom were All-Americans.

Briefly: Cal’s captains were senior inside linebacker Raymond Davison III, junior running back Patrick Laird and senior wide receiver Jordan Veasy. … The 49ers had six scouts at the game, and the Raiders, Jets, Giants and Steelers each had at least one.