Breaking Down the Brandon Nimmo for Marcus Semien Trade

After rumors of the New York Mets potentially shaking up their core, they have taken the first step towards doing so.

Sunday evening, ESPN’s Jeff Passan reported that the Mets were sending left fielder Brandon Nimmo to the Texas Rangers for second baseman Marcus Semien. 

Prior to the swap, Nimmo was the longest-tenured Met, having been drafted in the first round back in 2011, while Semien signed with Texas on a big contract before the 2022 season. The two offer essentially contrasting skill-sets and are both locked into sizable contracts with their respective best days behind them.

Nonetheless, what is expected to be a busy offseason in New York has officially commenced in an unexpected way.

Brandon Nimmo Won’t Be a Lifelong Met

For years, Nimmo was considered one of the more underrated outfielders in the sport. He was the Mets’ everyday center fielder from 2018-2023, but battled injuries in ‘19 and ‘21. In that span, he slashed .270/.382/.453 with an OPS of .835 and averaged 20 home runs per 162-game season. 

Additionally, he made strides to improve defensively, posting six outs above average (OAA) in center in 2022. 

After regressing defensively in 2023, New York signed Harrison Bader and traded for Tyrone Taylor that offseason, shifting Nimmo to left. 

With the position shift came a greater emphasis on power. His average dropped to .224 in 2024, but he set a career-high with 90 runs batted in. In 2025, Nimmo hit .262 with a career-high 25 homers and 92 RBI. In each of the last two seasons, Nimmo added the stolen base to his game, as he swiped a combined 28 bags while being caught just once in ‘24 and ‘25. 

In every year outside of his rookie campaign in 2016, Nimmo has posted an OPS+ above league average. 

The idea of Nimmo playing anywhere but Queens is a tough idea to comprehend, especially when he is still an established 20+ home run, 90+ RBI bat.

So why was president of baseball operations David Stearns so quick to move Nimmo? 

Well, he will turn 33 before the 2026 season begins, and is still under contract for five seasons. Nimmo is set to earn $20.25 million each season through the end of the deal.

Without a doubt, the back-end of that contract could get ugly, which is part of why the Mets felt inclined to move him. He has also lost a step defensively, as he posted -1 OAA in left field in 2025 and has seen his sprint speed drop from the 91st percentile in 2022 to the 42nd.

Stearns also made a point in his 2025 post-mortem press conference that “run prevention” will be a top priority. New York was a bottom-10 defensive unit last season, and Nimmo, while not the key culprit, was not a solution in the field.

Simply put, his skill-set, in addition to a large financial commitment, made him expendable in Stearns’ eyes. His replacement, at least in terms of the trade, does satisfy many of Stearns’ desires.

Marcus Semien Brings the Mets Run Prevention

While Semien is not the offensive player he once was, he is still an elite defender at second.

Between 2019-2024, the shortstop turned second baseman hardly missed a game between the Athletics, Blue Jays and Rangers, and hit 20 or more home runs in every year outside of the COVID-19-shortened 2020 season.

Semien’s 2021 campaign was the pinnacle of his career, as he slugged 45 home runs in Toronto to finish third in AL MVP voting. In fact, it was Semien’s second time finishing top-3 in MVP voting, a feat he also accomplished in 2019 with Oakland. 

In 2023, he slashed .276/.348/.478 with an .826 OPS, 29 homers and 100 RBI, helping the Rangers to their first-ever World Series. Between 2019 and 2023, Semien eclipsed seven or more wins above replacement according to Baseball Reference (bWAR) three times. 

But things went south from there. Over the next two years, he slashed just .234/.307/.379 with a paltry .686 OPS. In 2025, despite battling injuries, he hit just 15 home runs.

Semien’s value comes from his glove, as even with disappointing offensive numbers, he compiled 4.1 and 3.3 bWAR, respectively, over the past two years. He was rewarded for his efforts, earning his second career Gold Glove in 2025.

The trade is far from a straight salary dump for the Mets, though, as Semien comes with a hefty price tag.

After signing a seven-year, $175 million deal with Texas prior to 2022, he is still owed $26 million for each of the next two years, and $20 million in 2028. The big difference for the Mets is the two fewer years remaining as compared to Nimmo. 

Either way, Semien will provide New York with a top-tier defensive second baseman, forming an elite double-play duo with shortstop Francisco Lindor.

However, there is a noticeable drop-off offensively, as Semien projects as a bottom-of-the-order bat for a contending team.

What comes next for the Mets?

The Mets made it clear that they are willing to do anything and everything to get the bad taste of 2025’s collapse out of their mouths.

If New York wants to be in contention for the National League East in 2026, it will need to replace Nimmo’s offense somehow. The easy answer is retaining Pete Alonso at first base, but the Mets still need to find another outfielder.

Cody Bellinger likely is the best fit, as he provides defensive skill (seven OAA), versatility (three outfield spots and first base) and high-quality offense (.813 OPS).

But the addition of Semien also complicates things on the dirt. The Mets already had a glut of infielders, with Mark Vientos, Brett Baty, Luisangel Acuña, Ronny Mauricio and Jeff McNeil all under contract for next season.

Now, Semien makes it six players for two spots, meaning likely multiple of the names mentioned will be moved. This trade indicates the Stearns will make seismic changes this offseason, and this is simply the first domino to fall.

Easy Deal to Understand for the Rangers

For Texas, it is much simpler. Much of its offense struggled in 2025, as it posted the fifth-lowest team OPS in the majors. Semien was certainly part of the problem, as were right fielder Adolis Garcia and catcher Jonah Heim, both of whom were non-tendered earlier this week.

The Rangers pulled the trigger on the deal, hoping that Nimmo would help provide some thump in their lineup while sacrificing some financial flexibility in a few years. They are now on the hook for Nimmo’s contract in 2029 and 2030. 

After all, Nimmo’s 25 home runs and 92 RBI would have both been the top tallies for Texas last year. With Wyatt Langford manning left field, Nimmo could presumably be a regular as the designated hitter, or manager Skip Schumaker could move Langford to another outfield spot. 

Next for the Mets, McNeil could be moved to offload even more salary, while they remain in pursuit of Alonso and likely more to bolster their roster. Meanwhile, the Rangers get a big bat that they desperately needed early in the offseason.