One of my greatest disappointments is not seeing deserving players with at least one Super Bowl ring. One of those guys is Zack Martin. I'm pretty sure this is his last season.
Real contenders don't have a starting LT that is designated "developing". No real GM or HC would permit their franchise quarterback's blind spot to be manned by a rookie that is perceived to be "raw".
Even when Tyron Smith, the 9th overall pick in the draft joined the team as a rookie, he spent that first season as the RT. Doug Free occupied LT. The following season, they switched.
Even Jason Garrett realized that you don't risk the health of your highest paid player to an inexperienced rookie, no matter the future potential.
What really should have happened was Tyler Smith at LT, Guyton at RT (his natural position), and that intelligent acquisition during veteran free agency at LG. Alas....