Sean Manaea will open the 2026 season in the Mets bullpen after being bumped from the rotation. | Photo: MLB.com
I've been breaking down pitching rotations for sharp bettors for longer than some of these guys have been in the league, and I'll tell you this: when a team moves a $75 million arm to the bullpen before Opening Day, the market always overreacts. That's exactly what happened Saturday morning in Port St. Lucie, when Carlos Mendoza informed Sean Manaea that he won't crack the Mets' five-man rotation to start the season. The 34-year-old lefty, who posted a brilliant 3.47 ERA and 184 strikeouts across 181.2 innings in 2024, is being pushed to a piggyback relief role. And if you're paying attention, there's money to be made on both sides of this news.
The Velocity Red Flag the Public is Missing
Let's get into why this happened, because the "why" matters more than the "what" when you're handicapping. Manaea's spring fastball is sitting at 88.6 mph this March. That's down 4.5 mph from his last healthy spring in 2024. For a guy whose entire pitch mix is built around setting up that heater, a 4.5 mph drop is not a blip. That's a fundamental change in the arsenal. His 2025 season was a disaster anyway, just 15 appearances, a 5.64 ERA, and he battled an oblique strain and loose bodies in his elbow. The arm simply isn't where it was.
Mendoza made the right call, and smart bettors should take note. Manaea posted a 3.72 ERA over his three Grapefruit League starts, which looks fine on paper. But ERA without velocity context is meaningless in March. A lefty sitting 88 mph in the big leagues is a completely different pitcher than one sitting 93. Hitters will adjust, and they'll adjust quickly once the real games start.
The Rotation the Mets Are Actually Rolling Out
Here's your Opening Week rotation, and frankly, I like it more than the market seems to. Freddy Peralta gets the ball March 26 against Pittsburgh. David Peterson follows March 28. Nolan McLean goes March 29. Clay Holmes takes the April series opener in St. Louis on March 30, and Kodai Senga rounds it out March 31. Peralta comes back around April 1 on regular five-day rest.
The early schedule works in the Mets' favor here. Multiple off-days in the first two weeks mean they can run this five-man setup without burning anyone out, and they won't need a sixth starter until April 12. That's when Manaea's window opens, assuming he's pitching well enough in relief to reclaim the spot. If not, Tobias Myers and Christian Scott are both lurking as alternatives.
Betting the Mets' First Two Weeks: The Totals Angle
Here's where the sharp money opportunity sits. Peralta was a legitimate front-of-the-rotation acquisition this offseason, and Senga's spring velocity has been electric, sitting 96.7 mph and touching 98.9 mph with a 1.89 ERA across 9.2 spring innings. Those two arms anchor this rotation, and the early schedule against Pittsburgh and St. Louis isn't exactly a gauntlet. If the books are still pricing in Manaea-related rotation uncertainty on early-season Mets games, you're getting value on unders when Peralta or Senga are on the bump.
Conversely, keep an eye on the days Manaea enters in a piggyback role. If he's coming in after three or four innings from a young arm like McLean, that middle-innings bridge with an 88 mph fastball could be vulnerable. Opposing lineups that have already worked through the starter's stuff will feast on diminished velocity from a reliever they've seen as a starter for years. Those specific game situations could push totals over.
The Win Total Futures Play
The Mets are sitting at 90.5 wins on the futures board, with the over and under fairly balanced across the market. They're the NL East favorites at +145, ahead of Philadelphia at +180 and Atlanta at +225. World Series odds are sitting at +1300 at DraftKings, putting them in the top four behind the Dodgers (+230), Yankees (+1000), and Mariners (+1200).
Here's my honest take on the win total. The Mets went 83-79 last year with essentially the same core, and they've had a win total of 90.5 or higher three times this decade, finishing under that number all three times. PECOTA projects them at 89.6 wins and FanGraphs has them at 89.7. Both projections land just below the posted number. Manaea's bullpen assignment doesn't necessarily hurt the win total, but it does remove some depth insurance. If Senga's hamstring flares up again (and remember, he admitted his body "changed" after the injury, going 0-3 with a 6.56 ERA in the second half of 2025), this rotation suddenly looks thin. The under 90.5 is where I lean, and Manaea's situation only strengthens that conviction.
The Prop Market Implications
If your book offers pitcher-specific game props early in the season, pay close attention to strikeout totals on days the Mets use Manaea in relief. An 88 mph fastball from the left side can still generate swings and misses against righty-heavy lineups, but the strikeout upside that made Manaea a legitimate front-line starter in 2024 is gone right now. His 75 strikeouts across 15 games in 2025 tell the story of a guy who was nibbling and surviving rather than dominating. Under on his personal strikeout props, if and when they appear, is the play until he proves the velocity is back.
Also worth monitoring: Mets team total props on days Holmes starts. Holmes transitioned from closer to starter, and having Manaea as his piggyback partner is an interesting gamble by Mendoza. If Holmes gives you three or four strong innings and Manaea can eat frames behind him, that's actually a solid formula for keeping opposing offenses off balance with the righty-lefty switch. But if either arm falters, the back half of those games could get ugly fast.
The Bottom Line for Sharp Bettors
Don't overreact to the Manaea headline, but don't ignore it either. This is a $25 million per year pitcher who is currently throwing 88 mph and sitting in the bullpen. The Mets' rotation is still strong enough to compete in April without him, especially with Senga's velocity looking rejuvenated and Peralta anchoring the front end. But the depth that was supposed to be this team's calling card just took a hit. Manaea's three-year, $75 million deal runs through 2027, and if the velocity doesn't come back, that contract becomes an albatross that limits the Mets' ability to make in-season upgrades.
For your betting card, circle the April 12 date. That's when the Mets will need to expand to a six-man rotation, and it's the moment we'll learn whether Manaea can reclaim his starting role or whether the market needs to fully reprice the Mets' pitching depth for the rest of the season. Until then, bet the matchups in front of you, lean under on the win total, and let the public overreact to the noise while you count the money.