Astros fans might remember Aubrey Huff as part of a 2006 trade with Tampa Bay that cost the team infielder Ben Zobrist, who has won back-to-back World Series rings with Kansas City and the Chicago Cubs. San Francisco fans remember Huff for his run as "Huff Daddy," whose red "rally thong" was a source of entertainment and inspiration for the Giants en route to the 2010 World Series title, the first of two championship teams for which he played. These days, Huff, 40, also hopes to be remembered as a cautionary tale for the abuse of Adderall, the stimulant used...