It’s difficult to imagine where the Mariners’ season would be if not for the late acquisition of Chris Young.

But with the continued injury issues and individual struggles in the starting rotation, it’s safe to say Seattle wouldn’t be sitting at .500 with a 25-25 record without him.

Young gave the Mariners another solid start at Safeco Field on a Monday afternoon, taking advantage of early run support and carrying a no-hitter into the sixth inning in Seattle’s 5-1 victory over the Los Angeles Angels.

Young threw 61 / 3 innings, allowing just one run on two hits, while striking out five and walking three to improve to 4-2. He continued his success at spacious Safeco Field — a place he has never lost. In four starts in Seattle this season, he has allowed just five runs in 271 / 3 innings pitched for a 1.65 earned-run average, while opposing hitters are mustering just a .141 batting average against him.

“I was trying to find an adjective for this guy today,” manager Lloyd McClendon said. “What a godsend for this rotation. He’s just been tremendous.”

Young signed with the Mariners on March 27 with four days remaining in spring training. At the time, Hisashi Iwakuma and Taijuan Walker were recovering from injuries, Roenis Elias was an untested and unproved commodity and veterans Randy Wolf and Scott Baker both opted out of their minor-league contracts. It left the Mariners in desperate need of an arm for the rotation. Two days after Wolf left over a contract dispute, the Mariners signed Young, who was released by Washington two days before.

He had been a one-time all-star, but he also had missed most of the 2013 season after having a complicated shoulder surgery that required part of one of his ribs to be removed.

“I really didn’t know what to expect,” McClendon said. “It’s just unbelievable. And he continues to make me say, ‘it’s unbelievable.’ As for expectations, I really didn’t have many. And if I did, I’d say he’s far exceeded them.”

There were a few less than stellar starts, but Young has been steady while others have struggled.

“He’s filled a huge hole for us,” said catcher Mike Zunino said. “He’s come in and given us great starts every fifth day. He’s done such a good job for us. “

Of course, the situation has worked out well for Young. There was a chance he might have had to start the season in the minor leagues if the Mariners hadn’t come calling with a $1.5 million contract.