The A's lost a 2-1 heartbreaker to the Giants in the bottom ofthe 10th inning Friday night, but the path to defeat was blazed bymissed opportunities throughout the night. How else to explain it when five pitchers give up just five hitsbut can't come out on top? Or when a team puts the leadoff runneron in six innings but can scrounge up just one run? Left-handed reliever Brian Fuentes allowed Aubrey Huff'swalk-off single in the 10th that scored Emmanuel Burriss for thewinning run, but the A's had lots of missed chances to look backon.