PULLMAN — Only seconds after Owen Eshelman threw a back-breaking interception, the exact kind of turnover that Washington State needed to avoid to upset No. 21 Boise State on Saturday night, his head coach sat him down on a nearby bench.

On the sideline, Eshelman talked with coach Kirby Moore, going over the play and what went wrong. Eshelman was looking for running back Kirby Vorhees, who ran to the right. Eshelman threw it left. It turned into a turnover, which sank WSU’s chances in a 31-10 loss to Boise State, the class of the rebuilt Pac-12.

Turns out, that was a play that the Cougars had installed early in the year, sometime in spring ball or fall camp. After the game, it seemed to frustrate Moore, even as he places his trust in a redshirt freshman making just his second career start.

“We weren’t on the same page there,” Moore said.…