The Cardinals’ Trio Of Bullpen Trade Candidates
The Cardinals' direction is one of the key storylines of the offseason. The franchise has made clear they're prioritizing the future while giving more playing time to young players in 2025. They've pushed back on initial chatter about a complete teardown, at least in part because a couple veterans with no-trade clauses prefer to see things through in St. Louis.
Even if they're not in a complete rebuild, the Cardinals should gauge interest on players with limited windows of contractual control. That's especially true in the bullpen. Their star closer will get the most calls from other teams, but St. Louis has a few relievers who could come up in talks. Projected salaries are courtesy of MLBTR contributor Matt Swartz.
The Cards are down to one year of control over Helsley. If they're not all-in for 2025, he should move either this winter or at next summer's deadline. An offseason deal would give an acquiring team a few extra months of Helsley's services and allow them to consider a qualifying offer when he hits free agency.
Katie Woo of the Athletic wrote last week that the Cardinals were already receiving quite a bit of interest. Derrick Goold of the St. Louis Post-Dispatch suggested the Cards may need to be "overwhelmed" to deal the righty, but they should be able to weigh multiple compelling offers.
Helsley is among the best few relievers in MLB. He's coming off three straight fantastic seasons. Helsley broke out with a 1.25 earned run average across 64 2/3 innings in 2022. A forearm strain wiped out a few months of his '23 campaign, but he posted a 2.45 ERA through 36 2/3 frames when able to take the mound. Helsley's arm held up over a completely healthy season this year. He fired a career-best 66 1/3 innings with a 2.04 mark over 65 appearances.
After beginning his career in a setup role, Helsley proved himself an elite closer this past season. He led the majors with 49 saves while surrendering only four leads. He paced the National League with 62 games finished. Helsley punched out nearly 30% of opposing hitters against a tolerable 8.6% walk rate. Going back to the start of the '22 season, he carries a 1.83 ERA with a huge 34.6% strikeout percentage through 167 2/3 innings.
Helsley has the kind of overpowering arsenal teams want in the late innings. His four-seam fastball sits above 99 MPH. Opponents had a surprising amount of success against that heater this year, but the ability to reach back for triple digit heaters makes it tough for hitters to adjust to his wipeout slider. Opponents whiffed on more than half their swings against the Helsley slider in 2024. He got swinging strikes at a 17.3% clip overall, a top 15 mark among relievers with at least 20 innings.
Alongside Devin Williams , Helsley is one of this winter's top two bullpen trade candidates. He'd fit for any contender. Teams that already have a closer could push him into the eighth inning. Clubs like the Phillies, Rangers and Red Sox have seen their closers hit free agency. The Blue Jays, Yankees, Orioles, Royals and Diamondbacks are other potential suitors.
Romero has had a nice two-plus year run at Busch Stadium. Acquired from the Phillies at the 2022 deadline for utility player Edmundo Sosa , Romero has emerged as skipper Oli Marmol's top lefty reliever. He has posted consecutive seasons with a sub-4.00 ERA, turning in a career-best 3.36 mark through 59 innings this year.
There are some concerns. After striking out 28.6% of batters faced in 2023, he posted a middling 21% strikeout rate this year. Romero had a much more difficult time missing bats within the zone in 2024. That's an issue for a pitcher who has never excelled at getting batters to chase off the plate. Romero has intriguing stuff, pairing a 94 MPH sinker with a slider and changeup. The breaking ball is by far his best offering and served as the putaway pitch for 40 of his 51 strikeouts this year.
As one might expect given that profile, Romero has been much better against same-handed hitters. Lefties have a .172/.267/.270 slash against him in his career, while right-handed hitters have teed off at a .280/.337/.472 clip. His 2024 platoon splits are just as extreme. Romero might be best suited for a situational role, but perhaps another team feels there's a tweak they can make to get better production against righty hitters. While Romero has increased the usage on his slider in every season since 2021, he still only used it about a third of the time this year.
Romero finished the year on the injured list due to forearm inflammation. The Cardinals announced that he isn't expected to require surgery and should have a normal offseason. Assuming that's the case, he should attract interest.
John King (eligible for arbitration through 2027, $1.5MM projected salary)
The 30-year-old King isn't as well known as Helsley or Romero, but he's coming off a nice season. The southpaw turned in a 2.85 ERA through a career-high 60 innings spanning 56 appearances. King is a pure ground-ball specialist. He kept the ball on the ground at a massive 61.7% rate this year and has a career rate just north of 62%. Among the 160 relievers who threw at least 50 innings, only three ( Tim Hill , Clay Holmes and Yennier Cano ) had a higher grounder percentage.
King doesn't miss bats, but he's a situational lefty who should appeal to teams looking to deepen their middle relief group. (The Yankees make for a speculative fit considering New York's love of relievers with plus grounder rates.) King is cheaply controllable for another three seasons and has held left-handed batters to a .250/.300/.320 slash over 308 career plate appearances. While the Cardinals aren't under any contractual pressure to deal him, this isn't the type of player that St. Louis would refuse to entertain in trade talks. If the Cards could pull a mid-level prospect or two, King could be on the move.
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