PHILADELPHIA — Chicago Cubs’ rookie pitcher Riley Martin continued his impressive work since making his Major League debut less than two weeks ago.

The 2016 Salem Community High School graduate made it four straight scoreless appearances, this time as a starter in Philadelphia Tuesday night. In his first Major League start, Martin retired the Phillies in order on six pitches, sandwiching fly outs by Trea Turner and Bryce Harper around a strikeout of Kyle Schwarber, who had homered twice against his former team the night before.

Martin pitched only the one inning, serving as the opener for the Cubs in a bullpen game that featured five pitchers and ended with 10-4 victory. For the season, Martin has not given up a run in four and a third innings, allowing only two hits, while striking out four and walking none.

Chicago (8-9) will go for the series win Wednesday at 5:40.