MINNEAPOLIS - Frank Thomas hit his 500th home run Thursday, routinely putting his head down as he rounded the bases while joining one of baseball's most elite clubs. The Toronto slugger became the 21st major leaguer to reach the career mark, a milestone that has usually meant an eventual spot in the Hall of Fame. Thomas hit a three-run shot in the first inning, connecting against Minnesota's Carlos Silva and sending a 1-2 pitch an estimated 396 feet into the left-field stands.