The Associated PressCardinal starting pitcher Garrett Stephenson fires to home plate against the Expos during the second inning.The Associated PressThe Expos’ Vladimir Guerrero reacts with a smiie after he was struck out by St. Louis starter Garrett Stephenson during the ninth inning.Cards top Expos 2-1The Associated PressMONTREAL—Scott Rolen made Garrett Stephenson’s wish come true.Rolen’s sacrifice fly in the ninth inning led the St. Louis Cardinals over the Montreal Expos 2-1 Tuesday night.Stephenson pitched a four-hitter for his first complete game since Aug. 5, 2000, and beat Livan Hernandez, who threw a five-hitter, in a game that took just 2 hours, 4 minutes.“This is unbelievable,” Stephenson said. “I wanted them to score runs so bad in the top of the ninth so that I could have a chance to go out there and win, because most guys don’t get to go out forSee Cards, Page 3C