Why is there an opportunity?Jonathan Goodwin, who started the past three years, was not brought back in free agency.
Who is in his way? Daniel Kilgore. The 49ers like him. They gave him an extension this offseason and think he is capable of starting.
Current thoughts: The edge goes to Kilgore. But if Martin can quickly adjust to the NFL and he has a strong preseason, and Kilgore struggles, I can see the 49ers going to Martin early. I expect him to become the full-time center at some point barring a big struggle.