Fowler, 31, went on the disabled list on July 25 with a left forearm strain. He returns with a .241/.333/.452 triple-slash line along with 14 home runs and 37 RBI in 333 plate appearances.
Piscotty, 26, has put up a mediocre .232/.340/.362 triple-slash line in 291 plate appearances. Other outfielders, including Tommy Pham and Jose Martinez, have performed better, so Piscotty will try to figure things out in the minors. Piscotty and the Cardinals agreed to a six-year, $33.5 million contract extension in March, so the move comes as a bit of a surprise.