After 75 years, Jack in the Box still has a head for business

You can’t blame Jack Box for being bigheaded.

Jack in the Box, home of the ping pong ball-shaped mascot, turns 75 this week on Saturday, Feb. 21.

The first restaurant opened on Feb. 21, 1951 at 6270 El Cajon Blvd. in San Diego, near San Diego State University.

It was founded by a former undergraduate, Robert O. Peterson.

The chain has grown to about 2,135 restaurants in 21 states, according to a recent news release, but remains based in San Diego. Its headquarters are off the I-15 Freeway...