Diamondbacks designate Andrew Hoffmann for assignment to reinstate Justin Martínez

What happened

The Arizona Diamondbacks announced the designation for assignment of right-hander Andrew Hoffmann, clearing a 40-man roster spot so that fellow righty Justin Martínez can be reinstated from the 60-day injured list. Martínez's reinstatement had been previously reported before the club made the corresponding roster subtraction.

Hoffmann came to Arizona from Kansas City just over a year ago — the Diamondbacks sent outfielder Randal Grichuk to the Royals ahead of last year's trade deadline to bring him over. He departs with 23 2/3 big league innings across both organizations. Under the general mechanics of how designations work, Arizona now has seven days to trade him, release him, or pass him through waivers, after which an outright assignment to the minors becomes the likely path, assuming he clears.

Why it matters

The move is less about Hoffmann's departure than about who it brings back. Because the 60-day injured list removes a player from the 40-man roster count entirely, reinstating Martínez required a corresponding subtraction — and Hoffmann drew the short straw.

The timing carries weight for a club sitting at 76-68 (.528) and trying to hold second place in the NL West. A bullpen arm returning from the 60-day list is, in theory, a meaningful addition to a roster navigating a stretch run. Whether Martínez is ready to contribute immediately is, per the reporting, still a question the club will answer in the coming days.

The numbers

Hoffmann's big league résumé is brief and, by the numbers, difficult to spin. Across 23 2/3 innings split between Kansas City and Arizona, he allowed runs at a 6.85 earned-run-per-nine clip. His 20% strikeout rate, 15% walk rate, and 32.4% ground ball rate are all, per MLB Trade Rumors, subpar figures — a combination that tends to make life uncomfortable for any pitcher relying on weak contact to bail out the walks.

The minor-league version of Hoffmann tells a more interesting story, which is presumably why Arizona held onto him as long as it did. In 2025, his first full season as a reliever, he posted a 3.19 ERA across 42 1/3 innings at Triple-A. The underlying numbers there were genuinely encouraging: a 31.7% strikeout rate, a 7.2% walk rate, and a 54.2% ground ball rate — all above average, per MLB Trade Rumors. That is a very different pitcher than the one who showed up in the majors, and the gap between those two profiles is essentially the whole story of his time in the organization.

This year, per MLB Trade Rumors, the trends have moved in the wrong direction. He started the season in the majors, and the results did not hold. The club kept him mostly on optional assignment throughout his tenure — the organizational equivalent of saying "we see something here, but we're not sure what to do with it yet." At some point, the 40-man math forces a decision, and this was that point.

Where the club stands

Arizona enters the week at 76-68 (.528), sitting second in the NL West and 10.5 games back of the division leader, riding a two-game winning streak. The schedule does not offer much breathing room: the Diamondbacks open a series Monday at Fenway Park against the Boston Red Sox, with Mitch Bratt projected to face Alec Gamboa. Tuesday brings Merrill Kelly against Ranger Suarez, and Wednesday closes the series with Brandon Pfaadt opposing Payton Tolle.

A road trip to Fenway is not the softest backdrop against which to reintegrate a pitcher returning from the 60-day list, but the bullpen will be what it is. The Diamondbacks are deep enough into August that every roster decision carries playoff-race weight, and adding a healthy Martínez — if he is indeed healthy — is the kind of move a club in a wild-card chase needs to get right.

What we don't know yet

The reporting describes Martínez's reinstatement as previously reported and expected, but the club has not detailed his current health status, workload capacity, or any timetable for how he will be used out of the gate. A pitcher returning from the 60-day injured list can be reinstated without being fully stretched out, and how quickly Arizona deploys him in meaningful situations remains to be seen.

On the Hoffmann side, his path forward is similarly unresolved. The club used optional assignments throughout his tenure, but whether he clears waivers and accepts an outright assignment, or whether another organization claims him, is an open question. The 48-hour waiver clock will answer that soon enough.

What to watch

The immediate question is how Martínez looks in his first appearances back. A 60-day IL stint is a significant absence, and the Diamondbacks will presumably ease him in — though "ease him in" means something different in late August than it does in April.

For Hoffmann, the waiver wire will tell the story. His Triple-A numbers from 2025 are the kind of profile that tends to attract a look from a rebuilding club or a team thin on right-handed depth. Whether those figures are enough to generate a claim, or whether he ends up back in the minors on an outright assignment, is the subplot worth tracking over the next week.

And for Arizona, the broader question is whether the bullpen, with Martínez potentially back in the mix, is built for what the final weeks of the regular season will demand. At 76-68 and 10.5 games out of first, the Diamondbacks are a wild-card team playing wild-card baseball — which means the back of the roster matters more than it might look on paper.