SAN DIEGO — During the souped-up muscle car race on the Modern Collegiate Athletics Speedway, the Pac-12 had lost horsepower and got itself lapped. And so it eventually became a jalopy stalled on the tracks, with the money train fast approaching. I’m not going to say I’m shockproof, for me it was nothing more than a mild surprise when USC and UCLA turned in their letterman’s jackets to leave a conference on fumes and four flats for the numerically challenged but rich, tricked-up Big Ten. How can there be shockwaves when one considers the crazy current currently running through college sports? …