Mark McGwire, Tony Gwynn and Cal Ripken Jr. headline the first-time candidates on the 2007 baseball writers' Hall of Fame ballot released Monday, sure to spark debate on Big Mac's place in history as the steroid era comes under renewed scrutiny. Jose Canseco, whose book last year led to a congressional hearing on steroid use in baseball, also is on the ballot for the first time. Canseco said he used steroids along with McGwire when they were teammates.