WEST PALM BEACH, Fla. – It was a two-out walk in the first inning on Feb. 26. Not that big a deal, right?

For DJ Herz, it was a big deal. Not because the result of today’s exhibition game – a 3-0 loss to the Astros – was important. But because he knows two-out walks are among his biggest bugaboos, something the young left-hander is really trying to focus on correcting this year.

“Obviously, we don’t want to do the two-out walks,” Herz said. “A lot of weird stuff happens when that happens.”

What happened after this two-out walk of Isaac Paredes? A two-run homer by Yainer Diaz. Then back-to-back singles. And suddenly, what could’ve been a quick, 1-2-3 top of the first turned into a laborious 24-pitch frame.

So, even though the game didn’t count, is the two-out walk in spring training that important?

The Nationals are getting their most durable reliever back for the season’s final month.

Derek Law, the workhorse setup man who landed on the injured list two weeks ago with a flexor strain in his right elbow, was activated Monday and will be available for tonight’s series opener in Miami.

Law was confident all along his IL stint would be short, and indeed he was back throwing within a week of being shut down. He threw 20 pitches to live hitters Saturday and pronounced himself ready to return. The Nats acquiesced, activating him without first requiring a minor league rehab stint.

Even with the time missed, Law still leads all National League relievers with 75 2/3 innings pitched. If he returns to his normal work rate, he would become the Nationals’ first reliever to reach 90 innings pitched since Tyler Clippard in 2010. And if he can throw 17 2/3 innings in the season’s final 25 games, he will eclipse Saul Rivera’s club record of 93 relief innings pitched in 2007.

Needing to clear a spot on the active roster for Law, the Nats optioned right-hander Orlando Ribalta to Triple-A Rochester following Sunday’s game. The rookie has struggled in four big league appearances over the last several weeks, allowing five runs and 10 hits in only 3 1/3 innings.

The Nationals keep running into walls trying to find out if Joan Adon can become a regular member of their bullpen.

Adon was placed on the 15-day injured list this afternoon with a right shoulder biceps strain, removing the erratic reliever from the active roster again and replacing him with rookie Orlando Ribalta, who was recalled from Triple-A Rochester.

The Nats are awaiting MRI results on Adon, who had not pitched in six days but did briefly warm up during Monday night’s game against the Yankees. Teams cannot backdate IL moves more than three days, so Adon won’t be eligible to return until Sept. 10.

The 26-year-old, a starter throughout his professional career, was moved to the bullpen in Rochester earlier this season, with the Nationals thinking he might develop into an effective long man. But he’s appeared in only eight big league games across three stints with the club, and he has yet to record more than four outs in any relief appearance.

Ribalta returns to the majors only eight days after he was optioned to Triple-A, a move that came only seven days after he made his big league debut. The 6-foot-8 right-hander was scored upon in each of his two appearances for the Nats but sported a 2.64 ERA, 1.154 WHIP and 69 strikeouts in 47 2/3 innings at Rochester and Double-A Harrisburg.

It’s been more than two months since Joey Gallo last played for the Nationals, a significant hamstring strain having brought his season to an immediate halt on July 11 in Detroit. The team’s lineup that evening included a host of names no longer affiliated with the organization: Lane Thomas, Jesse Winker, Eddie Rosario, Nick Senzel.

Finally activated off the 10-day injured list today, Gallo is healthy but not in the Nats lineup for tonight’s series opener against the Rockies. The lineup instead includes a host of names playing at Triple-A two months ago: James Wood, Juan Yepez, Alex Call, Andrés Chaparro, José Tena.

“It’s funny, because when I was down there, a lot of these guys I met down there. And now they’re up here,” Gallo said “I actually know everybody really, really well. I don’t know if it’s a good thing that I know everybody, because I was hurt. But it’s cool. It’s a new clubhouse, but it’s the guys I already knew and was hanging out with down there.”

Gallo spent the last two weeks at Rochester on an extended rehab assignment, during which he hit three homers, drove in eight runs, walked 11 times, struck out 12 times and saw action both at first base and in right field.

The extra work, he believes, was necessary after the long layoff.

The last week was not especially kind to the Nationals, who went 2-4 on their road trip to Baltimore and Philadelphia, at times looking overmatched by two of the best teams in baseball. The good news: They’re back home and facing a team with a worse record in the Rockies. At 46-79, Colorado is tied with Miami for the worst record in the National League, with only the wretched White Sox even worse than them across the majors.

The Nats still need to play well the next three days, of course, and they’ll hope DJ Herz can keep up what he’s been doing the last few weeks on the mound. After a midseason hiccup, Herz has gotten back on track, with a 3.04 ERA over his last five starts, including a quality start last week at Camden Yards. He struggled a bit at Coors Field earlier this summer, though, lasting just 3 2/3 innings in the thin mountain air.

The Nationals did not see Austin Gomber in that late-June series in Colorado. The left-hander enters with a 4.82 ERA and 24 homers allowed in 125 innings but did produce quality starts in two of his last three outings. The Nats have a big bat back in the lineup, with Joey Gallo finally activated off the 10-day injured list after a two-week rehab stint at Triple-A Rochester. He replaces Travis Blankenhorn, who was optioned to Triple-A.

The Nats also activated Robert Garcia off the bereavement list and optioned Orlando Ribalta to Rochester, giving them three lefties in the bullpen for the first time this season.

WASHINGTON NATIONALS vs. COLORADO ROCKIES
Where: Nationals Park
Gametime: 6:45 p.m. EDT
TV: MASN2, MLB.tv
Radio: 106.7 FM, 88.7 FM (Spanish), MLB.com
Weather: Clear, 73 degrees, wind 11 mph in from left field

BALTIMORE – The smile on Orlando Ribalta’s face was still there Wednesday afternoon, some 19 hours after he made his major league debut in the ninth inning of the Nationals’ 9-3 victory over the Orioles.

It was far from a perfect debut; he retired only two of the five batters he faced and had to be pulled when his pitch count got too high. But the experience nonetheless was one Ribalta will never forget.

“I obviously had a lot of adrenaline going, but I know it’s part of the environment, being the first time,” he said. “It was the best thing. It was really cool.”

Promoted from Triple-A Rochester along with first baseman Andres Chaparro, Ribalta was thrown right into the proceedings, handed the ninth inning with the Nats holding a comfortable lead. Davey Martinez hoped the 26-year-old right-hander could record the final three outs of the game, but the manager ultimately had to summon Derek Law to finish it off.

Ribalta, whose head admittedly was spinning under the circumstances, will continue to get opportunities now that he has arrived in the big leagues. The Nationals hope to learn more about the physically imposing reliever over the season’s final seven weeks, determining if he looks like he could be part of the 2025 bullpen or not.

BALTIMORE – When the Nationals signed Harold Ramirez to a minor league contract on June 15, then called him up to the majors a week later, the intention was clear: Add a proven big league hitter to a lineup and bench that could use more of them, the kind of bat that could help a team win more games and perhaps even keep itself in a wide-open National League wild card race.

When the Nats designated Ramirez for assignment prior to Tuesday night’s game against the Orioles, the intention was also clear, if dramatically altered from two months prior: It’s time to prioritize young players who may have a future with the organization than older ones who don’t.

It wasn’t so much about Ramirez’s production. The soon-to-be 30-year-old hadn’t been great, but he hadn’t been awful, either. It was about creating a roster spot – and playing time – for Andres Chaparro, a 25-year-old rookie acquired two weeks ago from the Diamondbacks for Dylan Floro who theoretically could figure into the team’s long-term plans.

Chaparro, let’s be clear, is not a top-rated prospect. He was the return for two months of a veteran setup man, not two years of a productive everyday player. But his Triple-A numbers over the last two seasons – a .282/.363/.500 slash line with 51 doubles and 48 homers in 242 games – were hard to ignore.

And given the current state of the Nationals, who are sorely lacking in power, especially from the corner infield positions, it made all the sense in the world to get Chaparro up here now and get an extended look at him.

BALTIMORE – As this season transitions from one of early dreams of a surprise run to one that’s still primarily focused on the future, the Nationals decided to make a pair of transactions today that will give them a chance to look at two more young players at the expense of veterans.

The Nats promoted first baseman Andrés Chaparro and reliever Orlando Ribalta from Triple-A Rochester prior to this evening’s series opener against the Orioles and cleared space for both by designating designated hitter Harold Ramírez and reliever Jordan Weems for assignment.

“We want to take a look at some of these young kids,” manager Davey Martinez said. “Both have done really well at Triple-A.”

Indeed, Chaparro and Ribalta have been knocking on the door, performing at a level worthy of consideration. Now each will get an opportunity to make his major league debut.

Acquired just two weeks ago at the trade deadline in a last-minute deal with the Diamondbacks for Dylan Floro, Chaparro went on a tear at the plate in 10 games with Rochester. The 200-pound corner infielder hit four homers with 10 RBIs, a .419 on-base percentage and 1.076 OPS, picking up right where he left off with Arizona’s Triple-A affiliate in Reno, where he batted .332 with 19 homers and 75 RBIs in 95 games.

BALTIMORE – Hello from Camden Yards, where the Battle of the Beltways wraps up over the next two nights. The two teams split their two-game series in D.C. back in May, so it’s anybody’s game here this week.

The Nationals are still looking for consistency from their rotation, and that includes Jake Irvin, who gets the ball tonight. The right-hander has put together a couple of quality starts since the All-Star break, but he’s still pitching as well as he did during the season’s first half, and is coming off a game in which he allowed five runs in five innings to the Giants, including three home runs surrendered.

The Nats lineup will actually be facing a familiar foe in Trevor Rogers, the former Marlins left-hander acquired by the Orioles at the trade deadline. Rogers took the loss in each of his two starts against the Nationals earlier this season, but it wasn’t really his fault. He allowed only five runs in 12 innings, but his teammates provided only two runs of support. The Baltimore lineup, suffice it to say, is a bit more productive than the Miami one, so he may not have to worry about support as much tonight.

The Nats made a couple of roster moves before tonight's game, selecting the contracts of infielder Andrés Chaparro and right-hander Orlando Ribalta, and designating Harold Ramírez and Jordan Weems for assignment

WASHINGTON NATIONALS at BALTIMORE ORIOLES
Where: Camden Yards
Gametime: 6:35 p.m. EDT
TV: MASN2, MLB.tv
Radio: 106.7 FM, 88.7 FM (Spanish), MLB.com
Weather: Partly cloudy, 82 degrees, wind 6 mph in from left field

As the World Series shifts back to Houston to wrap up the 2022 major league season, the Arizona Fall League enters the last week of its short campaign.

The final week of the AFL kicks off this weekend with the 16th annual Fall Stars Game, and two Nationals prospects were chosen to the National League roster: catcher Drew Millas and right-hander Orlando Ribalta.

Millas, the 24-year-old acquired by the Nationals at the 2021 trade deadline as part of a three-prospect package from the Athletics in exchange for Yan Gomes and Josh Harrison, has had an impressive month in Arizona. He leads the Peoria Javelinas with a .314 average, .529 slugging percentage, .862 OPS and five doubles. He has also hit two homers with 13 RBIs and a .333 on-base percentage in 13 games.

The No. 30 prospect in the Nats system, per MLB Pipeline, rose through the minor league ranks this summer. Starting the season with Single-A Fredericksburg, he earned two promotions to Double-A Harrisburg after two stops at High-A Wilmington.

Between the three affiliates, Millas slashed .225/.340/.350 with a .690 OPS, 14 doubles, two triples, six homers, 36 RBIs, eight stolen bases and 51 walks.

The Nationals concluded the 2019 First-Year Player Draft with a total of 39 selections. The Nats selected 13 right-handed pitchers, six left-handed pitchers, two outfielders, 14 infielders and four catchers. 24 of the selections came from four-year universities, seven from junior colleges and eight from the high school ranks. Adding to the nine selections made on the first two days, the Nats started the final day of the draft by selecting Fresno State shortstop J.T. Arruda in the 11th...