UPLAND, Calif.—Frank Pastore, the former major league baseball pitcher who became a popular Christian radio show host, has died. He was 55.

Southern California radio station KKLA, which aired Pastore's show, said on its website that he died Monday, nearly a month after he was critically injured in a motorcycle accident.

Pastore had been in a coma since a car collided with his motorcycle Nov. 19. The accident came hours after he pondered the risk of motorcycle riding on his daily radio show, in which he discussed the possibility of life after death.

Pastore pitched for the Cincinnati Reds from 1979 until 1985 and for the Minnesota Twins in 1986. After playing ball, he obtained a master's degree in philosophy at Biola University and became a radio host.