Maddox, 26, was promoted to Boston's roster on Wednesday from Triple-A Pawtucket for his first stint in the Majors. He became the first Red Sox reliever to not allow a baserunner with at least one inning pitched in his debut since lefty Edwin Escobar did so on Aug. 27, 2014.
"Very good," said Boston manager John Farrell. "Good power, showed some tilt to his slider. You watched the body language and the mound presence and he embraced the moment. This is a young guy that's been on the come this year … Very quick, very solid inning through the heart of their order."
Christian Boutwell is a reporter for MLB.com based in Houston. He covered the Red Sox on Saturday. This story was not subject to the approval of Major League Baseball or its clubs.