The House Government Reform Committee wants to know whether Palmeiro lied in March when he testified under oath that he had never used steroids.
He was suspended for 10 days by baseball on Aug. 1 after a positive steroids test. The next day, Palmeiro agreed in a telephone conversation with Government Reform Committee chairman Tom Davis, R-Va., to let baseball release information requested by the panel.
Davis and the committee's ranking Democrat, Henry Waxman of California, submitted to baseball a list of what they wanted, including the timeline of Palmeiro's case, the substance for which he tested positive, and details about any previous drug tests taken by the player.
"Major League Baseball has complied with the Government Reform Committee's request to produce all documents related to Rafael Palmeiro's positive steroid test," Davis and Waxman said in a joint statement Friday. "The Committee will shortly begin its review and will not have further comment until that review is complete."
Palmeiro returned from his suspension Thursday, but he didn't play in the Orioles' 4-2 victory over the Tampa Bay Devil Rays.