Brock Purdy may play football like a veteran, but he’s only 23 years old and just finished his second career training camp. He’s still learning important lessons about life in the NFL. The 49ers trading quarterback Trey Lance to the Dallas Cowboys on Friday is another look at the brutal side of the league’s business.… Continue reading Brock Purdy uses Trey Lance trade to 49ers as NFL QB life lesson – NBC Sports Bay Area & California