49ers camp: Will Brock Purdy work on improv skills in preseason?

SANTA CLARA – Amid the regimented practices of training camp, 49ers’ quarterback Brock Purdy doesn’t go off-script much.

So when can he work on the art of improvisation – an aspect that paid off in the NFC Championship Game and an area he could exploit more in his third season?

On Sunday, Purdy stayed after practice and threw passes on the run to Guillermo Escalante, one of the equipment staff’s sure-handed members. “I wanted to get after it in terms of staying on the move, being...