The home run to Trout wasn’t remotely indicative of how the rest of Burnes’ day would go. The 29-year-old right-hander carved up the Angels’ lineup with his elite pitch mix — a 95-mph cutter, a sharp slider and a devastating curveball. In February, the Orioles acquired Burnes in one of the most significant offseason moves in franchise history, bringing in a bona fide ace to fortify a young rotation.

He was as advertised Thursday, and the Orioles are already getting what they bargained for.

Burnes is the only pitcher in MLB history to allow just one hit while striking out at least 10 batters and not issuing a walk on opening day. The only Orioles pitchers to strike out as many on opening day as Burnes did Thursday are Mike Mussina in 1998 and Dave McNally in 1970. The only other pitcher in Orioles history to throw six-plus innings on opening day and allow no more than one hit is John Means in 2021. Burnes, whom the Orioles acquired from the Milwaukee Brewers for prospects DL Hall and Joey Ortiz, is the 12th pitcher in Orioles history to record 11 strikeouts without issuing a walk in a game — a list that includes Jim Palmer, Mike Flanagan and Mussina.

The Orioles added three more runs in the second off Angels starter Patrick Sandoval to bounce the left-hander after just 1 2/3 innings. Rutschman, who went 5 for 5 with a walk in his first opening day game last year, roped a two-run single to score Ramón Urías and Jorge Mateo, who reached on an error and doubled, respectively, to put the Orioles up 4-1. With the hit, Rutschman became the first MLB player to reach safely in each of his first eight career opening day plate appearances since 1972, according to the Elias Sports Bureau.

The star catcher is now 7 for 9 with two walks on opening day in his career.

After Santander hit a sac fly to score Rutschman in the second, the switch-hitter mashed a big fly over Oriole Park’s deep left field wall in the fourth for the first homer of Baltimore’s season. Santander, one of the Orioles’ best sluggers with 61 long balls over the past two seasons, is playing for a potentially lucrative contract this year as he will be a free agent in the offseason.

Mullins had an up-and-down 2023 season as he dealt with a nagging groin injury. He was one of the majors’ best players in 2021, and hoping he can return to that production in 2024, the center fielder started the year strong with a three-run homer to center field to blow the game open in the seventh.

Between the two homers was a sacrifice fly from first baseman Ryan Mountcastle, who was one of the 10 Orioles hitters who either recorded a hit or walked in the win. The 11 runs the Orioles scored are the second-most on opening day in club history.

Two defining features of the 2023 Orioles were their comeback wins and avoidance of sweeps. Forty-eight of their 101 victories were in come-from-behind fashion, and their regular-season streak of not being swept dating to 2022 extended to 91, although the club was swept out of the playoffs in the AL Division Series by the eventual World Series champion Texas Rangers.

Thursday’s win was the first comeback of the season, and the sweep streak is up to 92.

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