Jake Arrieta tried to tamper his pregame butterflies. Making his big league season debut following shoulder stiffness, Arrieta struck out seven in 5 1/3 shutout innings Saturday as the Cubs beat the St. Louis Cardinals 3-0 for their first three-game winning streak this season. Read more http://scores.espn.go.com/mlb/recap?gameId=340503116&teams=st.-louis-cardinals-vs-chicago-cubs
