LAKE BUENA VISTA, Fla. — Stephen Piscotty has been traded by the St. Louis Cardinals to the Oakland Athletics for two infield prospects, allowing the outfielder to be near his family's home in Pleasanton, California, following his mother's diagnosis with Lou Gehrig's disease.

Gretchen Piscotty was diagnosed in May with amyotrophic lateral sclerosis, a disease that attacks nerve cells. He left the Cardinals for five days after the diagnosis and returned May 31.

St. Louis receives Yairo Munoz and Max Schrock in the deal announced Thursday.

The 26-year-old Piscotty hit .235 with nine homers and 39 RBIs in 107 games last season, spending stretches on the disabled list because of a strained hamstring and groin. He has hit .268 with 38 homers and 163 RBIs in 2 1/2 major league seasons. He agreed in May to $33.5 million, six-year contract.

Munoz, 22, hit .300 with 13 homers and 68 RBIs this year for Double-A Midland and Triple-A Nashville. Schrock, 23, batted .321 with seven homers and 46 RBIs for Midland, and was a Texas League All-Star.