"The PET scan showed it was clear," Roberts said of a recent test used to detect cancer in the body. "I'm very encouraged."
Roberts, a Major League outfielder for 10 seasons, told reporters on a conference call in May that he had Hodgkin's lymphoma.
Hodgkin's lymphoma is a cancer of the lymphatic system, which is part of the immune system. As it progresses, it compromises the body's ability to fight infection.
It's one of two common types of cancers of the lymphatic system. The other type, non-Hodgkin's lymphoma, is far more common.
Roberts said he had eight chemotherapy treatments over four months. The next step for him is three weeks of radiation in mid-August.
"It's going to be a different challenge," Roberts said of radiation. "I see the light at the end of the tunnel. The support I've had has been humbling. I see the end is near, that's encouraging."
Roberts has been able to move around to the Padres' Minor League affiliates during his chemotherapy, working with players on baserunning and outfield play. He also has kept tabs on the Padres, as he worked with many of these players closely in Spring Training.
"Watching these guys each night has been very therapeutic," Roberts said. "... It's made me feel very good."