• More From Rizzo On MLB Network Radio: D.C. GM Mike Rizzo was asked if he'd walk MLB Network Radio hosts Kevin Kennedy and Jim Duquette through the Nationals' thought process in signing 28-year-old free agent right-hander Edwin Jackson to what is reportedly a 1-year/$11M dollar deal when he appeared on their show this afternoon to discuss the Nats' most recent addition. "We look at our rotation, our roster," the general manager said, "and we've got guys in different kinds