Thompson was optioned to Triple-A Memphis on Monday when the Cardinals recalled outfielder Chris Duncan.
(Updated 7/4/2006)

Analysis: Thompson, who went 4-0 with a 2.95 ERA as a rookie last year, allowed runs in nine of his last 16 appearances. During that span, the right-hander's ERA rose from 0.52 to 4.46. He's 5-1 with a 3.57 ERA in 72 career games.