Keider Montero gives the Tigers something they don’t have enough of right now: a pitcher who can take the ball, throw strikes, and keep going.
That’s why there’s a real argument for Detroit to leave the 26-year-old Venezuelan in the starting rotation instead of bouncing him back into relief. Montero has been in the Tigers’ system for a decade, and the profile is pretty simple from there. He’s durable, he fills the zone, and he’s shown enough in the majors to make the case that starting is where he does his best work.
Scott Harris made it clear at the end-of-season press conference that the bullpen is going to have to improve from within, especially through an “overflow” of starting pitching. That sounds neat in theory.
It also sounds like the kind of thing that can go sideways fast. The Tigers do have a cluster of rotation options, including Framber Valdez, Jackson Jobe, Troy Melton, River Ryan, Reese Olson, Keider Montero, and, as expected, Drew Anderson’s club option should be picked up.
There are also other pitchers who can spot start, plus the possibility of help arriving from the farm system as the year goes on. But that group is talented more than it is truly overflowing, and Olson’s status makes the picture even murkier.
If Detroit wants a bullpen upgrade this offseason, it may have to manufacture it by creating more usable starting options rather than chasing pure relievers. That’s the path Harris is talking about, even if the math isn’t exactly generous.
Montero has one case for the bullpen that jumps off the page. He had a 29.2 percent K-rate in relief, compared with 15.6 percent as a starter.
When he’s not pacing himself, his fastball ticks up and sits 95-97 mph, and the secondary stuff sharpens with it. The problem is that those same pitches haven’t consistently missed bats when he starts.
His slider, knuckle curve, and split-change have all produced unimpressive whiff rates in that role, which leaves him with too many balls in play for a true frontline starter. The knuckle curve is especially frustrating, because on paper it looks like a real weapon: high spin, plenty of depth, the whole package.
The changeup flashes, but it comes and goes. He’s done a solid job limiting hard contact, but that’s not a long-term plan you want to lean on forever.
The stronger argument, though, is to keep him starting.
Montero’s two best traits are the ones that matter most over a full rotation schedule: he stays on the mound and he throws strikes. He averages 5.5 innings per start, which is a little better than the typical starter these days.
That matters because the Tigers have other arms with bigger pure stuff - Troy Melton and River Ryan chief among them - but neither has established the kind of durability you want to bank on. In Ryan’s case, that’s putting it mildly.
Melton also doesn’t strike out many more hitters than Montero does, while Ryan’s strikeout track record is stronger but still hasn’t been tested much at the major league level. Montero’s best quality is the one you can only fully use in a starting role.
The innings record backs that up. Over the last six seasons, starting with his age-21 year, Montero has piled up consistent work without an injury history getting in the way.
2022: 103.2 innings
2023: 127.1 innings
2024: 146.2 innings
2025: 133.1 innings
2026: 159.0 innings
In 2026, Montero put up a 3.48 ERA with a 3.98 FIP and finished worth 2.5 fWAR. Those numbers fit a three-year climb, even though he’s never been treated like a priority piece and has bounced between roles.
In his big league career, he owns a 3.81 ERA across 53 starts, while in relief he has a 5.00 ERA in 63 innings. The fit just looks cleaner as a starter, and he handles the other parts of the job too - holding runners, fielding his position, all the little things that matter.
Melton and Ryan add another wrinkle to the decision. Both are talented enough to start, but both come with real questions.
One of them has barely pitched in three years. The other threw 114.1 strong innings, but then dealt with elbow trouble in spring camp and forearm tightness and fatigue late in the season.
That makes it hard to count on either as a full-season answer right now. If Melton is truly healthy, he absolutely belongs in the conversation.
The rookie season was impressive, and the talent and pitch mix are there. Still, his 4.09 FIP may be a more honest read on where he is than the 2.75 ERA he posted.
Detroit probably won’t tip its hand on this one anytime soon, and it may not settle anything until spring camp is nearly done. But the logic is pretty clear.
If the Tigers pencil Montero into the rotation, they open up a way to help the bullpen without shopping for a top-end reliever they may not get. Melton and Ryan could both wind up as starters eventually, but right now the durability questions are real, especially with Ryan.
Giving Montero the job that best fits him, then shifting one of Melton or Ryan - or both, if another short-term starter comes in - would let Detroit use its arms more efficiently and probably trim some innings along the way.
The Tigers need harder-throwing arms with nastier stuff in the bullpen. Keeping Montero in the rotation not only plays to his strengths, it also gives that relief corps at least one more high-velo arm with real breaking-ball bite if the club wants to avoid another season slipping away.
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For Detroit, the appeal is obvious: a lefty who can stabilize a relief group without forcing the front office into a long-term commitment. The question is whether the Rockies would move him for a minor league pitching prospect, and whether the Tigers view the price as worth paying once they weigh his fit, value and the kind of bullpen role he could fill. [Read more 🡒]