SEATTLE (AP) _ Randy Johnson, who missed most of last season with a back injury, was scratched from his first scheduled start of the 1997 season Friday due to the hospitalization of his son, Tanner, the Seattle Mariners said.

Tanner, whose first birthday is Saturday, was admitted to a Seattle hospital on Thursday with a viral respiratory infection. He was hospitalized overnight as a precaution and was in good condition Friday. He was expected to be released Saturday.

Right-hander Bob Wolcott was penciled in to start Friday night against the Boston Red Sox.

Johnson, the 1995 AL Cy Young Award winner, was tentatively rescheduled to start Saturday night against the Red Sox.

Johnson, 33, was 5-0 in eight starts last season before going on the disabled list in May. The hard-throwing, 6-foot-10 left-hander underwent surgery Sept. 12 to repair a bulging disc in his lower back.

Johnson was 18-2 with a 2.48 ERA in 1995 as the Mariners won the AL West.