Hey BC,
It's doubtful Buechele will start simply because he's been injured all week and unable to practice. Ehlinger has been working with the 1s.
I have heard a lot of different reports about Jerrod Heard. I've heard he's splitting time at QB and receiver. I've heard he's working with the 2s. I've heard he's only practicing out of the wildcat. I've heard he could possibly even start over Ehlinger. Conjecture is all over the place.
I'd imagine Ehlinger will start and I suspect the coaching staff will have fewer qualms starting him against San Jose State than they would against USC.