The New York Mets fanbase is being haunted by a ghost in recent days, with Baltimore Orioles first baseman Pete Alonso, who played for the Mets from 2019 to 2025, returning to Citi Field for a three-game series which started on Monday. Alonso remains beloved by the Mets fanbase, and it remains heartbreaking for a good portion of their supporters to see him continue to produce for his new team after he left in free agency.

It's not as if Alonso wanted to leave in the first place. The Mets simply did not want to pay him his market value, so he chose to get his money from the Orioles. But considering how much love he received from the fans at Citi Field, Alonso simply urged Mets fans to choose the Orioles as their secondary rooting interest even though it's usually frowned upon in sports.

“I know it's frowned upon. But you can always have a second team. You can always root for the Orioles, guys. American League team. Separate. If you want to have a secondary team, you can root for the O's,” Alonso said, via SNY Mets on X.

Pete Alonso relayed a message to Mets fans via @SteveGelbs:

"I know it's frowned upon. But you can always have a second team. You can always root for the Orioles, guys. American League team. Separate. If you want to have a secondary team, you can root for the O's" 😂😭 pic.twitter.com/Il0o1AQwaw

— SNY Mets (@SNY_Mets) September 15, 2026

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Perhaps some Mets would indeed heed Alonso's call. After all, the Orioles are in the AL East, the same division as the New York Yankees, and having them as another team to root for is another way for them to root against their in-city rival.

Moreover, the Mets and Orioles rarely face each other considering that they're from separate leagues, as Alonso said, so it's not like either team would pose much of a threat to each other's postseason hopes.

Alonso signed a five-year, $155 million contract with the Orioles this past offseason, and he entered play on Tuesday with 35 home runs and 100 runs batted in on the season to go with an OPS of .859. Just to further twist the knife of his departure from the Mets, he homered against them on Tuesday.

At the time of writing, the Mets and Orioles are locked in an extra innings contest with the game tied at 4-4.