Silseth (elbow) threw three scoreless innings Friday, allowing one hit and striking out three batters, in a rehab appearance with the Angels' Arizona Complex League team.
Detmers (3-6) took the loss Saturday against the Mariners, allowing five runs on four hits and four walks with three strikeouts in 3.2 innings. He was optioned to Triple-A Salt Lake after the start.
Singer (illness) is listed as the Royals' probable starting pitcher for Wednesday's game against the Guardians in Cleveland, Anne Rogers of MLB.com reports.
LAA
FOLLOW
Follow a team and personalize your FOX Sports experience