SAN DIEGO (AP) Max Scherzer was scratched from his scheduled start Friday night and placed on the 10-day disabled list with a sore neck.
The Washington Nationals turned to left-hander Matt Grace to face the San Diego Padres.
Manager Dusty Baker announced the move about two hours before first pitch.
Scherzer was coming off a 10-strikeout performance against San Francisco.
Grace is 1-0 with a 4.46 ERA. He grew up in the Los Angeles area and played at UCLA.
Scherzer is 12-5 with a 2.25 ERA this season.