Hyun Jin Ryu has officially arrived.

The Blue Jays’ ace followed two uncharacteristic starts to open the season with a dominant outing in Wednesday’s 2-1 win over Atlanta, tossing five innings of one-hit, shutout ball with a changeup that turned the Braves’ hitters inside out.

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“Even when I was warming up for today’s outing, I had a good feel for the changeup,” Ryu said through interpreter Bryan Lee after picking up his first win as a Blue Jay. “In general, my changeup is a go-to pitch and a pitch that I feel really comfortable with. There wasn’t a certain point in the game where I felt more comfortable. I just feel very confident that I can throw it for a strike and also expand when needed.”

Ryu turned to that elite changeup 32 times, and he forced an exceptional 14 swings and misses. With the pitch working as well as it ever has, the left-hander’s other offerings immediately held more value. Ryu’s slider was particularly sharp, generating five whiffs in 27 pitches, and his fastball was back to normal after it held him back in his earlier outings.

Even with those pitches clicking, though, Ryu -- as any ace does -- still looked for ways he could be better.

“My fastball and cutter got better compared to the last outing,” Ryu said. “My changeup, fastball, cutter -- they all improved in today’s game. I just think I need to brush up on it a little bit more. One thing that I don’t like is the amount of base on balls that I gave up in the outings that I’ve pitched, so I still need to brush up on my command and make sure that I go through the lineup more easily.”

The cutter Ryu mentions was jumping up to a higher velocity than he’d felt in his previous outings, which is another piece to the puzzle. Since Ryu isn’t blowing hitters away with high-90s heat, his pitches not only need to work, but they need to work together.

“The whole point of throwing the cutter is to make it look like the fastball, so the velocity has to be there,” Ryu said, after his cutter averaged 86.4 mph alongside his 90-mph fastball. “The past two games, it had more of a slider movement with less speed and more movement, which is something that I don’t want from my cutter. What you saw today is something that I’ll try to replicate going forward with more velo and less movement.”

This start is exactly what the Blue Jays had in mind when they inked Ryu to a four-year, $80 million deal this past offseason to anchor their rotation and lift their young positional core.

Ryu’s last outing against the Nationals represented a step back instead of forward, as he allowed five runs on nine hits over 4 1/3 innings, jumping his early ERA to an atypical 8.00 mark. His velocity was down, and he didn’t have his pinpoint accuracy, but that’s not what he pinned the poor start on.

Instead, Ryu was disappointed with his lack of in-game adjustments against a National League team that he’d seen before. He’d pitched well against the Nationals in the past, but they beat him to the adjustment. He made sure that didn’t happen twice.

Ryu owned a 2.73 ERA over five career starts against the Braves entering Wednesday’s start, including a shutout last May while with the Dodgers. This time out, the emphasis on his changeup with other pitches playing off of it kept the Atlanta lineup uncomfortable and Ryu in full control.

His next outing, if the Blue Jays keep their five-man rotation schedule with next Monday’s off-day, would fall on their “home opener” at Sahlen Field in Buffalo against the Marlins on August 11.