This year will be the first year since his freshman season that Martinez will have quality back up behind him. I would like to see Martinez run more aggressively but not necessarily trying to "run people over". That's not his forte nor should he try to make it that way. Martinez has been a warrior as a signal caller. The way he braces for tackles on the run some times causes whole sections and bars to cringe. Martinez is as durable as any, regardless of the high ankle sprain/turf toe that hindered the second half of his freshman season. But he doesn't exactly have a huge "upside" as far as development to be able to play at the next level. If his goal is to attempt to play QB (which I doubt he ever will in the NFL), he won't enhance his chances if he bruises himself up trying to run people over and, which I pointed out already, was never a part of his game. Hell, breaking a tackle is a rarity for him. 9 times out of 10 the first defender that can get a hand on him gets a stat for that play. His running ability is slightly different from Eric Crouch, who he's compared to often.
Armstrong, will be the #2 QB next year. Last season, it's safe to say he was the "silent #2" as he was turning heads when he first arrived on campus with just his athletic ability, but the staff chose to red shirt him to give him time to mode into a serviceable college QB rather than just throwing him in the fire and depending on his raw ability. He had an excellent spring, and I heard from a few players that he demands respect in his actions and how he approaches his workouts on the field and in the weight room. If Martinez would have went down for an extended time last season Armstrong would have been the guy we seen stepping in for him. But since Martinez was healthy most the season, and no significant injuries, Armstrong was able to save a year and get into his playbook.
RKIII is a great guy, goofy kid, but I doubt we will ever see him take a significant snap or a snap at all barring injury. Last season, in his limit snaps, he didn't show himself to be much of a better option than the back up he replaced (Brion Carnes). He'll be the "LaTravis Washington" of the group this year.
Johnny Stanton, he will redshirt and get an opportunity make a case for himself as a valuable back up in 2014. An Elite 11 finalist (would have won had he not left camp to be with his team, great teammate). He's the exact type of QB Beck wants/needs in his system, but I think he will have an up hill battle after his redshirt year trying to grab the starting spot from Armstrong as he would be in his 3rd season as a husker in 2014 (red shirt sophomore). He'll have some game time experience under his belt also.