Six days is a long time in the baseball world.

At this time on Friday, Brandon Young was on top of the world, celebrating with his family at Daikin Park in Houston, the stadium he grew up going to, after nearly throwing a perfect game. Young settled for eight innings of one-hit baseball in by far the best outing of his brief career.

Less than a week later, that feeling of triumph was washed away four pitches into the game as Carlos Correa, the Astros’ No. 2 hitter, hit a line drive past the infield for a single. Perfect games are a rare, phenomenal feat for a reason. Even if Young had completed it on Friday, the odds that he would have repeated would have been extremely low.

But on Thursday it wasn’t just that he wasn’t perfect. Against the same team, he wound up on the other end of the spectrum as he allowed seven runs in 5 1/3 innings before leaving the game with left hamstring discomfort after covering first base. He is being examined, and the severity of the hamstring injury is not known,

The Astros went on to win the first in a four-game series 7-2.

Six days ago, Young’s fastball averaged 94.1 mph and maxed out at 96.7 mph. His other successful major league starts followed a similar pattern — on July 29, when he allowed two runs in six innings, his fastball averaged 94.2 mph and also topped out at 96.7 mph. But on Thursday he averaged 92.9 mph and hit only 93.9.

“A little different command than he had last time,” interim manager Tony Mansolino said. “He commanded his fastball a lot better last time out. A couple of those splits in the first inning, I don’t know if those were the best pitches in those spots. You can second-guess that a little bit. But it’s all fastball command for me. You’ve got to command your fastball in this game, and if you don’t, especially against that team, seen him twice in the span of a week, it’s gonna be a challenge.”

By the end of the first inning, the Astros were out to a 2-0 lead after Christian Walker homered on a splitter Young sent to the middle of the strike zone. Houston added two runs in the second and three in the third as Young gave up his second home run of the day.

Was there any silver lining to his day? He at least made it into the sixth inning, something he’s done in only four of his 12 major league starts.

“What I will say with him is, he gives up seven or whatever it is, and the fact we had him out there in the sixth inning is a testament to him hanging in there,” Mansolino said. “That’s a big deal for a young pitcher.”

Although Young could not repeat his performance and the offense failed to score more than two runs despite every player in the lineup getting a hit, Samuel Basallo and Dylan Beavers, the Orioles’ No. 1 and No. 3 prospects, at least contributed in their Camden Yards debuts. While their major league careers are less than a week old — Beavers debuted Saturday, with Basallo following a day later — neither has shown trouble adjusting at the plate.

On Thursday, Beavers hit his first home run in his first at-bat at Camden Yards. It was a 390-foot shot to the right-field flag court.

“It was pretty awesome,” Beavers said. “I don’t know, I kind of blacked out. I was just running but, when I got back in the dugout, it was one of the cooler things I’ve ever experienced,” he said. “Best home run I’ve ever hit, for sure.”

He received a ball after the game, but he said it doesn’t have an authentication sticker on it so he’s not sure if it’s the ball. He’s 5-for-17 in five games.

“He’s a good player; he’s interesting,” Mansolino said. “He’s a guy that you haven’t heard a whole lot about here over the last few years. All these young kids that have come up, probably the least heralded up until maybe the last couple months. It’s a really short swing. He’s hanging in there on defense. He looks good out there. Naïve in a good way. Very confident.”

In the sixth, Basallo and Beavers played a part in getting a run across. After Colton Cowser opened the inning with a base hit, Basallo hit a single that moved Cowser to second. Cowser advanced to third on a hit from Coby Mayo, and Beavers drove Cowser home with a single.

Basallo also caught his second game, a sight that will become more common now that Adley Rutschman is on the injured list.

This article has been updated.