9 Under-The-Radar Bullpen Trade Candidates

There'll be plenty of relievers who change teams between now and July 31. Most will be straightforward -- productive veterans with one or two seasons of remaining club control on non-contenders (e.g. David Bednar, Dennis Santana). With teams like the Dodgers and Phillies motivated to add an impact arm, someone like Jhoan Durán or Emmanuel Clase could go.

Those names have all been kicked around the rumor mill for weeks. Each deadline season also features a few trades of controllable bullpen arms who weren't atop any trade boards. Last summer saw the likes of Tanner Banks, Huascar Brazobán and Nick Mears change hands. The Orioles and Rays already lined up on the Bryan Baker deal before this year's draft.

We'll highlight a few under-the-radar names whom teams could call on in the next week. None of these players made MLBTR's Top 40 trade candidates list, and they've not been mentioned more than in passing (if at all) on our pages this year. Still, clubs always look beyond the most obvious trade candidates in their deadline preparation.

Ronny Henriquez, RHP, Marlins (pre-arbitration, controllable through 2030)

Miami claimed the 25-year-old Henriquez off waivers from the Twins during the offseason. The 5'10" righty was once a notable prospect in the Texas and Minnesota farm systems. He saw a bit of MLB action with the Twins in 2022 and '24 but was mostly in a depth role in Triple-A. Henriquez has stepped into a high-leverage role in Miami, recording 13 holds and the first six saves of his big league career. He carries a flat 3.00 earned run average while striking out more than 32% of opponents across a career-high 48 innings. He's sitting in the 96-97 MPH range on his fastball and missing bats with a mid-80s sweeper.

Henriquez's command can come and go, but he has a live arm and is capable of missing bats in bunches. Going back to the beginning of May, he has a 35% strikeout rate and a solid 7.3% walk percentage with a sub-3.00 ERA in 33 appearances. He is picking up closing experience, and while a contender would probably eye him more as a seventh or eighth inning type, he should draw a lot of interest. Miami has him under club control through the end of the decade, but Henriquez is less than six months removed from being on waivers. They should be open to selling high even if they won't force a deal.

Brock Stewart, RHP, Twins ($870K salary, controllable through 2027)

Stewart was out of MLB for more than three years before he resurfaced with the Twins in 2023. He reeled off 27 2/3 innings of 0.65 ERA ball out of nowhere until elbow surgery cost him almost all of the season's second half. Shoulder issues limited him to 16 games last season. Stewart began this season on the injured list with a hamstring strain.

The 33-year-old righty has been healthy for the past three months, however. He's back in good form, pitching to a 2.59 ERA while fanning more than 31% of opponents. He's limiting walks (7.8%) while averaging 96 MPH on a fastball that headlines a five-pitch mix. Stewart has picked up 13 holds and only blown one lead all year. He's playing for barely above the league minimum and will be cheaply controllable for another two seasons in arbitration. Stewart isn't going to command anywhere near the prospect return that Minnesota would receive if they trade Durán or Griffin Jax. He's an effective setup option in his own right, but the Twins would certainly listen to offers based on his age and injury history.

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