sentences:  He was out on assignment covering other events for the network during each of the next two televised 300 games (Johnny Guenther in 1969 and Jim Stefanich 1974) and he also missed the first televised 7–10 split conversion as done by Mark Roth in 1980.Some even considered it to be a "curse" that if Schenkel was covering bowling, the bowlers would not throw a perfect game.This appeared to have some merit to it when Don Johnson rolled a memorable 299 in the 1970 "Tournament of Champions".