The Marlins must give Jack Ralston an opportunity

[Ely Sussman]

For much of the 2026 season, the bullpen has been a strength of the Miami Marlins. The unit has leveraged its ample depth and variety of skill sets. Miami's relievers were particularly vital during a record-setting month of June, when the Fish were patching things together with only two conventional starting pitchers at times.

Heading into the All-Star break, however, the 'pen is now a source of anxiety. The July 5 implosion in relief of a perfect Eury Pérez was a turning point. A series of significant injuries has compounded the issue—the Marlins are still without a timeline for Anthony Bender's return, while John King, William Kempner and Michael Petersen each got hurt themselves last week. 

Meanwhile, right-hander Jack Ralston continues to quietly throw up zeroes with Triple-A Jacksonville. If common sense prevails, his next outing will come at the major league level.

Ralston is not being "rushed" to the majors in any sense. The St. Louis Cardinals drafted him out of UCLA way back in 2019 and he's been pitching in the upper minors since 2023. A month from now, he'll be turning 29.

The Marlins signed Ralston as a minor league free agent this past offseason and he turned heads immediately with six scoreless appearances in spring training. It's been more of the same through 31 games with the Jumbo Shrimp, as his 1.07 ERA leads all Triple-A pitchers with a comparable number of innings. No opponent has plated a run against him since June 18 and he hasn't allowed multiple earned runs at any point this year. His 9.7% walk rate is the best of his professional career.

Ralston's arsenal consists of a splitter, four-seam fastball and slider, with the split being his go-to offering. Its overall usage is nearly 50%, accounting for 48 of his 63 total strikeouts (76.1%). It's largely why he has been even more effective against left-handed batters (.432 OPS allowed) than righties (.516 OPS). The only active Marlins arms who use a splitter regularly are Tyler Phillips and Lake Bachar, and neither of them have an over-the-top release like Ralston. Even putting pitch quality aside, the contrast in style between him and his teammates would be valuable.

Lowest ERA among all Triple-A pitchers this season (min. 40 IP)

1. Marlins RHP Jack Ralston, 1.07
2. Marlins LHP Braxton Garrett, 1.54
3. Bradley Hanner, 1.99
4. Marlins RHP Josh White, 2.20 pic.twitter.com/0pzZhV5Bua

— Fish On First (@FishOnFirst) July 13, 2026

Ralston's fastball velocity is merely average for a righty reliever and he doesn't induce ground balls at a particularly high rate. He's still allowing home runs as often as he did in previous years, hence his nice-but-not-noteworthy 3.52 FIP. Success against MLB competition is far from guaranteed, but under the present circumstances, he deserves an audition with the Marlins.

The trade deadline is only three weeks away and the Marlins need to seek reinforcements. In order for them to confidently remove "bullpen help" from their shopping list, they either need rapid recoveries from the aforementioned injured guys or glimpses of excellence from other internal options. There's nothing more that Ralston can do at Triple-A to prove himself—it's time to test him against the top talent on the planet.

The only "obstacle" standing in Ralston's way, if you want to call it that, is securing a 40-man roster spot. But the Marlins could go in multiple directions, even without transferring anybody to the 60-day IL. The most straightforward move would be designating fellow reliever Zach Brzykcy for assignment in a corresponding move. Third-string catcher Brian Navarreto and strikeout-prone outfielder Rece Hinds are also DFA candidates, with the Marlins recalling a 40-man bat like Connor Norby or Agustín Ramírez to fill their shoes on the active roster in those scenarios.

A theme of the Peter Bendix era has been turning cheap acquisitions into legitimate contributors. Jack Ralston could be the latest example of that. He ought to be promoted once the Marlins resume play on Friday.

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[BMK3]

I have been waiting to see him since his great spring training.  I don't get the delay. I also think Garrett is ready for another shot while moving Phillips back to the back end of the bullpen where he is very effective.  We NEED another lefty in the pen.   Where is Randy Choate these days?