Less than two hours after the move was announced Wednesday, Wong was sent home from Busch Stadium because of a stomach illness. The team didn't anticipate he'd be available for its game against the Cubs.
Infielder Greg Garcia was optioned to Memphis. Garcia was hit by a pitch with the bases loaded in the 12th inning Tuesday night for the game-winning run against the Cubs, also his first career RBI.
The 23-year-old Wong opened the season as the Cardinals' starting second baseman. He was batting .225 when he was demoted April 27. At Memphis, he hit .344 with two home runs and 10 RBIs in 15 games with five steals in five attempts. He was 4 for 5 against Round Rock on Tuesday.
Veteran Mark Ellis has been starting at second since Wong was optioned and was batting .190 with seven RBIs in 63 at-bats.