Chen held the Yankees to a run on five hits and a walk while striking out seven, helping to snap the O's four-game losing streak.
"Me, of course I'm happy [to get a victory], but what matters the most is we won the game," Chen said through his interpreter. "That's what's important."
Chen has turned in a quality start in four of his last five outings, and he threw 76 of 106 pitches for strikes on Saturday.
"He's had a couple [good starts] like this," Showalter said of Chen. "He was carrying a so-so changeup, a so-so slider, but he had command of the fastball, which really gave him four pitches in all the quadrants."
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Facebook and Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.