Nationals general manager Mike Rizzo said Monday that he has received calls on Ivan Rodriguez, as well as members of his bullpen and veteran starting pitchers. Rodriguez is currently on the disabled list with a right oblique strain, so he will have to prove he's healthy before being included in any deal. We know that the Nats have fielded some interest in left-hander Sean Burnett, but Livan Hernandez could presumably draw some interest from small-market teams due to his reasonable contract.