SAN FRANCISCO -- So many of Matt Cain's finest moments came through sheer stubbornness.
He's the 20-year-old rookie who kept firing fastballs at Todd Helton in his major league debut. He's the unblinking staff veteran who started three postseason clinchers in 2012. He's the pitcher whose heart was beating out of his chest while finishing off a perfect game, though you never knew it to watch.Cain received a reminder of that perfect night on Tuesday, when the Toronto Blue Jays countered with J.A. Happ -- the same pitcher whom Cain opposed when he set down all 27 Houston Astros he faced.