BOSTON — In a frightening scene befitting the Houston Astros’ injury-ravaged season, first baseman Christian Walker exited Saturday’s 6-3 win against the Boston Red Sox after being struck in the head with a 93.3 mph fastball.

Walker left the field under his own power, but with a towel covering his face and being escorted by both manager Joe Espada and assistant athletic trainer Rafael Freitas. Walker remained on his feet throughout the ordeal and spoke to reporters in the Astros’ clubhouse following the game.

“I’m getting to feel OK,” Walker said. “I think the helmet took most of it, and I think turning away from it made it more of a glancing blow than a straight impact, but I feel OK, luckily.”

Walker underwent testing for a concussion and said, “I don’t see an issue with that.” That he spoke to reporters in a clubhouse amid blaring music is a positive sign.

Walker said he plans to play in Sunday’s series finale, presuming nothing peculiar happens overnight, which makes it unlikely he will join an Astros injured list that has swelled to as many as 16 this season and currently sits at 14.

“As long as I don’t wake up with some crazy neck stiffness or something like that, I plan on being in there,” Walker said.

The pitch, thrown by Red Sox southpaw Tyler Samaniego, broke the C-flap of Walker’s batting helmet before hitting his forehead. C-flaps are extensions that offer added protection for a player’s jaw and face. Shrapnel from the shattered piece landed in the grass behind the batter’s box.

“That was really scary,” said Espada, who sprinted from the visitors’ dugout to meet Walker as he staggered from the batter’s box.

The heart-stopping scene threatened to interrupt a superb start to Walker’s season. The 35-year-old slugger swatted his eighth home run of the year on Saturday, raising his OPS to .963 across his first 123 at-bats. Among the Astros, only Yordan Alvarez has a higher one.

Walker underwhelmed last season in the first year of a three-year, $60 million free-agent deal. A strained oblique slowed him that spring, but Walker also attributed some of his struggles to the pressure associated with playing on a big contract. He finished the first half of last season with 12 home runs, 47 RBIs and a .660 OPS.

Walker, whom Houston dangled in some trade talks this winter, is already on pace to shatter all of those pre-All Star break numbers and buoy an offense that leads the American League in runs scored.

“You want to come into a new situation where you feel like they brought you in for a reason and you want to prove people right,” Walker said on Saturday. “You want to show what you got. You want to help the team. You want to lead the team to a World Series. It’s disappointing when it doesn’t go that way. It’s nice to get started on the right foot, but there’s a lot of season left.”