Historically, the Boston Red Sox have always been the New York Yankees' biggest rivals, although there is no question that the rivalry has cooled down in recent years (even if the Yankees literally just saw them in the playoffs).

Heck, over the last decade, the Houston Astros have probably been New York's No. 1 enemy, even if the matchup has mostly been pretty one-sided (particularly in the playoffs).

But with the Red Sox rivalry not quite the same and the Astros beginning to fade, a new contender may have emerged for the title of the Yankees' biggest nemesis, and that team may be right in front of the Bronx Bombers right now: the Toronto Blue Jays.

You can tell that the Blue Jays hate the Yankees. They have a genuine disdain for them. Perhaps the Yanks don't exactly feel the same way because, well, it's the Blue Jays, but it's probably time to start taking Toronto a lot more seriously.

From 1994 through 2014 the Blue Jays didn't make a single playoff appearance. They were complete afterthoughts as far as the Yankees were concerned. But times have changed.

Since 2015, Toronto has made six trips to the postseason. That included back-to-back ALCS appearances in 2015 and 2016. That's in spite of having considerable roster turnover throughout all those years, too.

Not only that, but the Jays definitely had New York's number during the 2025 regular season, particularly at the Rogers Centre where the Blue Jays beat the Yankees six out of seven times. They've also gone 2-0 at Toronto thus far in this ALDS.

New York stayed alive with a Game 3 win on Tuesday night, but the Yanks must stave off elimination in the Bronx once again on Wednesday to force a winner-take-all Game 5 in ... gulp ... Toronto.

The fact that the we are even talking about the Blue Jays, who were never once a legitimate threat during the late '90s-early 2000s Yankees dynasty, seems pretty surreal. Nevertheless, here we are, and with Yankee killers such as Vladimir Guerrero Jr., George Springer and Alejandro Kirk littering Toronto's lineup, it's time to accept that the Jays mean business.

Is it too soon to officially label the Blue Jays the Yankees' biggest rivals in current day? Perhaps. This marks the first time New York has ever seen Toronto in the playoffs, after all. But you can absolutely feel the contempt coming from the Blue Jays' side. It's palpable. You have seen it with every run scored, every hit registered, every strikeout recorded by Toronto in this series.

Maybe the Yankees weren't even truly ready for it. But now, after rallying from a 6-1 deficit on Tuesday evening, it seems like New York has joined the fight and, hopefully, recognizes exactly what is at stake here. It's not just a trip to the ALCS. It's also about setting a tone for a budding rivalry that could end up being the fiercest one in baseball over these next few years.

The Blue Jays just signed Guerrero to a 14-year, $500 million contract extension. They were in the running for Juan Soto last winter. They aren't afraid to spend money, and they are suddenly becoming an intriguing destination for marquee free agents, even if said free agents would have to change countries.

To put it plainly? Toronto isn't going anywhere, and the Yankees may be realizing that now. Let's just hope they didn't discover it too late.