Free agent OT Marvel Smith, the former Steelers Pro Bowl standout has agreed on a multiyear contract with the 49ers, according to an ESPN report on Friday. Details of the contract, confirmed by sources close to Smith, were not yet available. But in a deal that protects the 49ers if Smith suffers further back problems, the nine-year veteran can earn more than $10M, if he is healthy for the first two seasons of the contract.