Ray pitched six scoreless innings to win at AT&T Park on April 19 .
Diamondbacks : LHP Robbie Ray ( 4 - 7 ) makes his third start against the Giants this season Saturday .
LHP pitched six scoreless innings to win at AT&T Park on April 19 .
Diamondbacks : LHP Robbie Ray ( 4 - 7 ) makes his third start against the Giants this season Saturday .