Forearm tightness will again prevent Angels starter Matt Shoemaker from taking the mound Tuesday in Seattle, per the Orange County Register.

Mike Scioscia has declined to reveal who will start in his place, though Nick Tropeano handled that duty last time Shoemaker was scratched.

Shoemaker has been sidelined since Sept. 1, but has not been placed on the disabled list. His absence, however, appears certain to be at least 15 days.