"It's been an up-and-down season in a lot of aspects, and so I really wanted to go out there tonight and just kind of put a good taste in everybody's mouth going into the offseason and into next season and kind of show everybody what we're capable of," said Hess, who matched a season high in innings with his eighth quality start this season.
"We had great defense back there as a team. [Catcher Austin Wynns] called a great game, and I just threw the best pitches I could."
The 25-year-old Hess allowed three hits and issued two walks, striking out four and exiting in a tie game. He outlasted Astros starter Gerrit Cole, who went six frames to surpass the 200-innings mark, holding Baltimore to just one run in the process.
After a day off, given Thursday's rainout, both clubs did little offensively.
The O's run came in the first inning courtesy of Adam Jones' double, which scored Jonathan Villar. Houston's only run on Hess was Josh Reddick's homer in the sixth.
"That was fun to watch. It was good to see him end on a good note," O's manager Buck Showalter said of Hess, who is tied for the third-most quality starts among American League rookies. " I really wanted him to have a good outing. That was good to see. I told him that. I didn't want to push it any more than that. Any time you see a young pitcher go against a good team for a third time around the batting order and still be able to get outs, that's good to see."
MOMENTS THAT MATTERED With a man on second and two outs, the Orioles came close to tying the game as Renato Nunez hit a sinking liner into center field. But Jake Marisnick, who came in as a defensive replacement in the sixth, hustled in and made a diving grab, getting hugged by teammates as he secured the win.
JONES' SWAN SONG Baltimore fans made sure the longtime Orioles outfielder knew how much he meant to them, giving Jones several ovations at the plate. The final one, in the ninth, was the loudest of the night and the crowd got to its feet again after Jones hit a deep lineout.
"It doesn't surprise me. Our fans know what Adam has meant. He's been a constant through thick and thin, knowing what you can expect out of Adam," Showalter said. "That's what managers, coaches, general managers, owners, fans -- they're all looking for someone they can count on. You know what you're going to get when they get through playing that song. He's a very dependable guy, just like a lot of people we've had here, but not necessarily the longevity he's had. To be able to do it over that period of time, I think people really appreciate it and want to thank him for it."
HE SAID IT "I can hear everything. I appreciate it, but like I said, I'm focused on the pitcher, Gerrit Cole. If I lose any focus on him, he gets you out. Just try to keep my focus on them." -- Jones, on the ovations
UP NEXT The Orioles and Astros will play a doubleheader on Saturday, sending Dylan Bundy to the mound for Game 1 and Yefry Ramirez for Game 2. Houston will counter with Justin Verlander and Dallas Keuchel. First pitch of the opener is 4:05 p.m. ET.