Kyle Farmer homered and drove in five runs as Cincinnati sent the Phillies to their third straight loss.
Miley (5-4) came off the 10-day injured list and showed no ill effects from a sore foot. He gave up a run and six hits while striking out six.
Schrock, pushed into service lately because of injuries in the Reds infield, drove in three runs. He hit a two-run homer in a four-run second and an RBI triple in the fifth.
The 26-year-old rookie doubled in the seventh, but then had to leave for a pinch-runner.
Farmer’s fourth homer of the season was a two-run drive in the third. He added an RBI single in the fifth and a bases-loaded double in the seventh.
Tyler Naquin drove in two more for Cincinnati with a bases-loaded single in the second.
Vince Velasquez (2-1) was tagged for six runs on five hits and three walks in three innings.
Odúbel Herrera had three hits for the Phillies, who have lost nine of 12.
Phillies: OF Roman Quinn is on the 60-day injured list after hurting his left Achilles tendon running the bases. It’s the latest setback in an injury-plagued career for the 28-year-old.
Reds: 1B Joey Votto (fractured thumb) played catch on the field before the game. He is eligible to come off the 10-day injured list on Friday. INF Mike Moustakas (heel), who has been on the injured list since May 20, also was running on the field. There was no word on when they might return.
The Reds send RHP Sonny Gray (1-3) to the mound Tuesday against Phillies RHP Aaron Nola (3-4). Gray allowed just two hits and struck out five in six innings in a 3-0 win over the Nationals Thursday. Coming off a tough stretch, Nola allowed one run in six innings in Wednesday’s 4-2 loss to the Marlins.