Pete Alonso’s first year in Baltimore had the kind of impact the Orioles could only hope for when they brought him in. Even with a slow start, he finished as the American League leader in home runs and RBIs and gave the clubhouse the sort of presence it had been missing.
That naturally raises the question: where does Alonso’s debut stack up against the best first seasons by players the Orioles acquired in the offseason or through trades? Looking through the record book, the answer lands in the middle of a pretty impressive field.
This list is built only from players who arrived in Baltimore via signing or trade, which means the Orioles’ seven Rookie of the Year winners are left out. It’s also sorted by Baseball Reference WAR in each player’s first Orioles season, a setup that tends to give a boost to everyday position players, especially those at premium defensive spots.
At the top, there’s no debate. Frank Robinson’s 1966 season still stands alone.
Brought over from the Reds for Milt Pappas and two other pitchers, he turned into the most important acquisition in franchise history. He won the American League Triple Crown in his first year in Baltimore, took World Series MVP honors, and powered the Orioles to the first championship in team history.
That was also the year he launched a home run completely out of Memorial Stadium - 541 feet - and helped create the famous “HERE” flag.
Miguel Tejada’s 2004 season comes next, and the shortstop spot matters here. Still, the numbers were huge even by star standards. The former AL MVP hit .311/.360/.534 with 34 home runs and an AL-high 150 RBIs, then finished in the top five of AL MVP voting again despite the Orioles going 78-84.
Roberto Alomar’s 1996 debut checks in third. The Hall of Famer hit .328/.411/.527 and brought his usual slick defense to second base, posting a .985 fielding percentage. His arrival helped spark a 17-win jump from the previous season and got Baltimore back to the ALCS for the first time since 1983.
Reggie Jackson and Ken Singleton round out the next two spots, though for very different reasons. Jackson’s lone Orioles season is remembered more for the tension than the production; after holding out for a month following the trade from Oakland, he drew the kind of reaction Jim Palmer captured when he said, “I would say Reggie Jackson was arrogant.
But the word arrogant isn’t arrogant enough.” Even so, Jackson led the league with a .502 slugging percentage, hit 27 homers and 27 doubles, and drove in 91 runs for an 88-win team that missed the postseason.
Singleton, acquired from the Expos before the 1975 season, simply did what he always seemed to do: hit. He finished at .300/.415/.454 and played steady right field as Baltimore went 90-69.
Alonso lands sixth on the list with a 4.9 bWAR season in 2026. First base and the position’s defensive value keep him from climbing even higher, because the bat was doing the heavy lifting. His 43 home runs and 113 RBIs led the American League and made the five-year, $155 million deal he signed after opting out of his Mets contract look like a strong bet.
The rest of the top 15 is a mix of star power, short-term impact, and a few seasons that deserve more memory than they usually get. Javy López, part of Baltimore’s push to compete again in 2004, hit .316/.370/.503 with 23 homers and 86 RBIs. Don Buford, who came over in the Luis Aparicio trade, hit .282/.367/.437 in 1968 and split time between second base, center field, and left field while finishing in the top 15 in AL MVP voting.
Jimmy Key’s 1997 season might be the most surprising pitching entry near the top. After helping knock the Orioles out of the 1996 ALCS, he joined them and delivered a 3.43 ERA over 212 innings in what was his fifth and final All-Star season.
Nelson Cruz follows at No. 10 after a brief but beloved run in 2014, when he led the league with 40 home runs, drove in 108, and hit .271/.333/.525 as Baltimore won the AL East. That same season also placed Alonso in a tiny bit of baseball history, as he joined Cruz, Jim Thome, and Juan Soto as the only four players ever to hit 40 or more home runs in their first season with two different teams.
Mike Cuellar’s 1969 campaign was as dominant as it sounds: 23 wins, a 1.01 WHIP, a 2.38 ERA, and 290.2 innings in 39 starts, plus a Game 1 World Series win over Tom Seaver. Robin Roberts, signed in May after being released by the Yankees, gave Baltimore a strong 1962 season with a 1.13 WHIP and 2.78 ERA in 25 starts.
The final two spots go to pitchers and catchers who quietly delivered useful seasons in less-than-memorable years. Kevin Brown, not that Kevin Brown, signed a one-year deal after eight years with Texas and posted a 1.18 WHIP and 3.60 ERA in 26 starts during the shortened 1995 season.
Ramón Hernández signed a four-year deal before 2006 and hit .275/.343/.479 with 23 homers and 91 RBIs in 135 games behind the plate, while also leading the league by throwing out 42 would-be base stealers. Corey Patterson, acquired from the Cubs that same year, chipped in a .276/.314/.443 line, 16 home runs, 45 stolen bases, and solid center field play in a season that finished at 70 wins and faded from memory fast.
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For Baltimore, the appeal is obvious: turn an area of depth into a chance to address a separate need, especially on the pitching side. Elias has worked with Miami before, and that history only adds to the sense that this is a path worth watching as the trade market develops. Names like Sandy Alcantara or Eury Perez fit the kind of upside the Orioles might chase, even if nothing has moved beyond the speculative stage so far. [Read more 🡒]