Los Angeles, CA -- (Sports Network) - Arizona Diamondbacks pitcher Randy Johnson was scratched from his scheduled start on Sunday against the Dodgers due to shoulder fatigue.

Johnson's next scheduled start is September 13 against the Reds.

Johnson, who will turn 45 on Wednesday, will meet with team physician Michael Lee to undergo further tests. The five-time Cy Young Award winner is 10-9 with a 4.21 earned run average in 26 starts this season for Arizona.

He is six wins away from reaching the 300 mark.

Rookie Max Scherzer will make the start in Johnson's place.