From Wikipedia: Showtime Championship Boxing is a television boxing program airing on Showtime. Debuting in March 1986, it is broadcast live on the first Saturday of every month. Showtime Championship Boxing, which is very similar to HBO World Championship Boxing, features Mauro Ranallo on play-by-play, Al Bernstein as the color analyst, Jimmy Lennon (Sr. and Jr.) as ring announcers, and Jim Gray as reporter.