49ers rookies Upton Stout, Nick Martin playing ‘way bigger’ than their size

SANTA CLARA — Upton Stout and Nick Martin might not be the biggest players of the 49ers’ rookie class, but the two young defenders pack a punch.Through eight training camp practices, defensive coordinator Robert Saleh has noted how the two third-round picks, who are both under six feet tall, are progressing.“I’ll start with Nick,” Saleh said Friday. “One thing we’re not worried about with him is his violence, getting off a block, and understanding how to get to the football. He just has to continue mastering the scheme to give himself the opportunity to play fast.“Upton, he is a straining, scrappy young man, don’t fall asleep on his size. I mean, the guy plays way bigger than he is and way bigger than he looks. He’s got a violence to him; he’s got a violence to his demeanor. So, he’s coming along really well, too, in that regard.”Both rookies have shown their ability to make plays on defense, Martin forcing a fumble during a recent practice and Stout running with the first team at the nickel position. Still, both players have a long...