The Nationals announced last night that infielder Nasim Nuñez was optioned to Triple-A Rochester after the game. A corresponding move wasn’t announced, but the Washington Post’s Andrew Golden reported not long after the Nuñez move that fellow infielder Andrés Chaparro is being called up for the first his first big league look of the 2025 season.
Nuñez has had a bizarre tenure with the Nats so far. Washington originally selected him out of the Marlins organization in the 2023 Rule 5 Draft, scooping him up primarily due to his defensive prowess at shortstop. Nuñez stuck on the roster all season in 2024, appearing in only 51 games and taking only 78 plate appearances, during which he batted .246/.370/.262 with no home runs. A double was his lone extra-base hit on the season. It’s rare that a team can roster a player all season with such limited usage, but the Nats were firmly in rebuild mode last year and thus could make it work.
The 2025 season has played out similarly. Nuñez, now 24, has appeared in only 23 of the Nationals’ 53 games since his recall from Rochester in early April. He’s averaged less than one plate appearance per game in that time, taking 49 turns at the plate and hitting .186/.271/.233. Nuñez has one year and 58 days (1.058) of MLB service time dating back to Opening Day 2024 but still has only 127 major league plate appearances despite never landing on the injured list.
For a player who’d never played in Triple-A at the time of his selection in the Rule 5 Draft, that lack of reps feels particularly problematic — at least from a developmental standpoint. Nuñez hadn’t even hit well in two seasons of Double-A ball.
Virtually no scouting report on Nuñez has suggested he comes with substantial upside at the plate, but being limited to a total of 158 plate appearances between the majors and (briefly, earlier this season) his first taste of Triple-A work doesn’t give Nuñez much of a chance. He’s gone 15-for-18 in stolen base attempts (many as a pinch-runner) and indeed graded out as a plus defensive shortstop.
The Nationals have effectively been carrying Nuñez as a designated pinch-runner/late-inning defensive upgrade for more than a year. He was on the active roster for the entire month of May and received all of eight plate appearances. Seldom do players in today’s game find themselves used with this level of infrequency. The move back down to Triple-A should give Nuñez some much-needed reps in the batter’s box.
In his place, the Nats will summon the 26-year-old Chaparro, whom they acquired from the D-backs last summer in exchange for veteran reliever Dylan Floro. Chaparro opened the season on the injured list due to an oblique strain but has been hot since his activation in early May. The righty-swinging slugger has played in 20 games and totaled 82 plate appearances with Rochester this year, slashing .296/.390/.606 with six homers, four doubles, a 12.2% walk rate and a 24.4% strikeout rate.
Chaparro made a brief big league debut last year, getting into 33 MLB games and slashing .215/.280/.413 with four home runs. He played third base previously in both the D-backs and Yankees systems, but the Nats have used him exclusively at first base and designated hitter in both Triple-A and the big leagues.
There should be opportunity at both spots in the majors. Designated hitter Josh Bell has at least posted passable numbers as a left-handed hitter in 2025, but the veteran switch-hitter has posted a disastrous .051/.178/.103 batting line in 45 plate appearances when swinging from the right side of the dish. Nathaniel Lowe’s splits at first base aren’t quite that pronounced, but he’s still hit very poorly in lefty-versus-lefty situations.
It’s feasible that Chaparro could find himself with a bigger role sooner than later. Bell has been a disappointment after signing a one-year deal in free agency and will be a DFA candidate before long if he can’t improve his overall .179/.274/.342 line on the season. Lowe is a trade candidate, though the fact that his bat has tanked after a strong April showing doesn’t do his market any favors.
One other area where many Nats fans might hope to see some change would be in the rotation, where righty Trevor Williams has struggled, but it doesn’t sound as though there’s anything planned on that front just yet. Asked about the security of Williams’ spot in the rotation after another rough start yesterday, manager Davey Martinez told the Nats beat: “Yeah, he’s in our rotation” (link via Mark Zuckerman of MASNsports.com). Martinez cited Williams’ pitch count as a reason that he was hooked after 4 1/3 innings, but he’d also allowed three runs (two earned) on six hits.
The 33-year-old Williams, who signed a two-year deal worth a guaranteed $14MM over the winter, has averaged fewer than five innings per start in 2025. He’s only completed six innings twice in 13 starts this year. He’s currently sitting on an ugly 5.91 earned run average, and over his past eight starts, Williams has been torched for a 6.41 ERA with just a 16.3% strikeout rate.
Williams’ 5.91 ERA is nearly three times the 2.03 mark he posted last year in nearly the same sample of work (66 2/3 innings in 2024; 64 innings in 2025). He never seemed likely to sustain last year’s success, which was buoyed by an 80% strand rate, career-low 4.2% homer-to-fly-ball ratio, and a .267 average on balls in play (second-lowest mark of his career, behind 2018’s .261). The extent to which he’s regressed has been a surprise, however. The fluke pendulum has swung the other direction on Williams’ strand rate, going from abnormally high to abnormally low — just 60.4% in 2025. That’s more than 12 points below both the league average and Williams’ career mark.
It’s not all bad luck, though. Williams didn’t have much margin for error with an 88.9 mph average fastball last year, but he’s on even thinner ice now with a “heater” that’s sitting 87.6 mph on the year. An already poor 9.4% swinging-strike rate has fallen to 8.4%. Williams is giving up more contact, particularly within the strike zone, and opponents have seen notable upticks in their average exit velocity, barrel rate and hard-hit rate against the veteran righty.
Unless Williams can turn things around, it’s hard to see how he can hang onto that rotation spot long-term. MacKenzie Gore is finally breaking out as one of the sport’s premier arms, and rotationmates Mitchell Parker, Jake Irvin and Michael Soroka have all been at least serviceable, albeit unspectacular.
Williams is aided by the fact that there’s very little depth that’s pushing for his spot. Lefty DJ Herz is already out for the season due to Tommy John surgery. Josiah Gray won’t be back from his own UCL repair until late in the season, at best. Shinnosuke Ogasawara is on the minor league injured list, as is top prospect Jarlin Susana. Other depth arms like Andry Lara and journeyman Adrian Sampson have struggled this year as well.
Former top prospect Cade Cavalli is a notable exception, as he’s in a tear in Triple-A during his first full season back from Tommy John surgery. Cavalli has a 1.52 ERA and 30-to-6 K/BB ratio over his past 23 2/3 innings. The longer the now-26-year-old Cavalli continues to excel, the tougher it’ll be to maintain the status quo at the back of the staff.