Weekly Pebble Report: Wilder Dalis is out to prove himself in 2026

Wilder Dalis (No. 24 PuRP) was signed by the Colorado Rockies in May 2023, well after the big signing period that usually happens in January, and has been an under-the-radar prospect since. 

Baseball America described him as a “late bloomer” who “turned in an inauspicious pro debut,” but Dalis turned things on in 2025 when he made his stateside debut – slashing .352/.440/.525 in 56 games in the Arizona Complex League followed by .241/.333/.379 in 31 games in Low-A Fresno. 

Ahead of the 2026 season, Brendan Gawlowski of FangGraphs wrote, “Dalis stood out in a positive way. He’s a good athlete with a chance to stick at short… it’s early, but the arrow looks up here.”

Dalis grew up in Maracay, Venezuela, as an only child where he lived with his mother and aunt. He started playing baseball when he was two years old and was a shortstop and right-handed batter. 

When he was 12, he picked up switch hitting.

“I’ve got a very good swing from the left,” he said. “My tío said ‘You’ve got a good swing. You’re gonna try to be a switch hitter,’ and I switch hit the whole way.”

Despite growing up hitting righty, Dalis now prefers hitting left-handed.

“It’s more comfortable,” he said. “It’s more free, so it’s good, and my right hand has more power.”

In 2025, Dalis batted left-handed much more than right-handed and found success. In 309 plate appearances as a left-handed batter (87 games), Dalis slashed .319/.410/.480 with 26 extra-base hits. By comparison, in 46 plate appearances as a right-handed batter (30 games), he slashed .250/.333/.400 with four extra-base hits.

Through May 3 with the Fresno Grizzlies, Dalis has batted left-handed nearly twice as often as right-handed in 2026, but has also struggled a bit more. In 76 plate appearances as a left-handed batter, Dalis has hit .161/.316/.339 with two doubles and three home runs. In 25 plate appearances as a right-handed batter, Dalis has hit .261/.280/.435 with one double and one home run. 

Off the field, Dalis prides himself on having a good relationship with his teammates and with fellow Venezuelan shortstop Ezequiel Tovar, who is also from Maracay.

“He’s talked to me offensively about how to use my hands and how to stay back,” Dalis said of Tovar through interpreter Fred Ocasio, “and defensively just always try to create that good hop and use my hand out in front to create that good hop to field the ball.”

Tovar had good things to say about Dalis, as well.

“He has all the talent in the world,” Tovar said through interpreter Edwin Perez. “I think once he puts it all together and gets that maturity that all of us professional baseball players do. I think he’s going to show a lot of people that talent because he’s a very, very talented guy.

Dalis also works really well with fellow switch-hitter Roldy Brito (No. 11 PuRP).

“He gives me a lot of advice and a lot of energy. He’s a really good player,” Dalis said. “The mental aspect of the game is where we help each other out (most). We talk a lot about having confidence and playing the game with confidence.”

It helps that all of the players move as a cohort from the Dominical Summer League to the Arizona Complex League, and then on to Fresno and beyond.

“I’ve always had a good relationship with my teammates,” Dalis said. “I don’t think there’s any difference (between the ACL and Fresno) because I’ve played with all the guys here, and there’s no difference. We all came together from the Dominican to Arizona. 

“But there was one thing: When I left for Fresno, I was playing with more Americans,” he continued. “I liked listening to them and learning about them as well, because they know different things.”

Dalis is currently ranked 18th in the system according to MLB.com and Baseball America. But he’s not worried about rankings. He’s looking towards the future and what he can bring to the Rockies when the time comes.

“Obviously, I know I’m talented,” he said, “but I’m not thinking about ‘Hey, I’m a prospect in the Top 100’ or whatever. I know what I have and my abilities, and that’s it. I don’t worry about the other stuff.

“Hopefully in the near future, I’ll be there (in the majors) and can help the team win and make an impact with the team in Denver.”

The Isotopes dropped four games in their series against the Salt Lake Bees (Los Angeles Angels), including an odd and rare 1-0 loss in a pitching duel. When the Isotopes won, their bats were firing on all cylinders and the pitching was able to stave off the Bees, but the two sides rarely worked in tandem during this series. The Isotopes are sitting at 34-29, 4.0 games back of the PCL lead.

⬆️ Stock Up:No deep drive into left from this Castellano

Signed this off-season to a minor league contract, 25-year-old right-handed pitcher Eiberson Castellano made his Triple-A debut against Salt Lake and turned in quite the gem. Castellano was named Pacific Coast League Pitcher of the Week for his six scoreless innings of work, giving up just one hit while tallying seven strikeouts and two walks.

⬆️ Stock Up:Dr. Veen’s Extra-base Machine

Zac Veen (no. 9 PuRP) continues to push for a fresh chance at playing in the big leagues with yet another strong week. Veen went 11-for-28 with a home run, three doubles, two triples, four RBIs, and two stolen bases. Veen has been playing very well for the Isotopes this season, hitting .317/.417/.525 with eight home runs, 12 doubles, three triples, 40 RBIs, and 13 stolen bases.

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The Isotopes are off to the Pacific Northwest for six games against the Tacoma Rainiers (Seattle Mariners).

Helped by a series split against the Portland Sea Dogs (Boston Red Sox), the Hartford Yard Goats sit atop their division in the Eastern League. The series got off to a rough start as the Yard Goats were blown out and shut out. The next day the pitching staff gave up ten runs in another loss. However, Hartford then rattled off three strong wins to seal a series split.

⬆️ Stock Up:Running Up That Hill

GJ Hill had his best series of the season after largely struggling this year with Double-A Hartford. Hill went 9-for-21 at the plate with a double, a triple, four home runs, and ten RBIs. With this series, he boosted his OPS from .643 all the way to .794 on the season.

⬇️ Stock Down:Fish out of water

Left-handed pitcher Griffin Herring (no. 10 PuRP) made just one appearance out of the Yard Goats’ bullpen this series and it was a rough one. Herring went just 0.2 innings and gave up seven earned runs on three walks and four hits—including a home run—without recording a strikeout.

Upcoming

The Yard Goats will host the New Hampshire Fisher Cats (Toronto Blue Jays) in a seven game series that includes a double-header on Wednesday.

After losing the first two games of the series against the Hillsboro Hops (Arizona Diamondbacks) it looked like the Spokane Indians could regain their footing. They won two in a row including a 12-5 blowout. Unfortunately, they then lost their final two games of the series including a thud of a series finale via a 14-0 beatdown.

⬆️ Stock Up:Continued rehab progress

Right-handed pitcher Gabriel Hughes (no. 12 PuRP) made his second rehab start with the Indians and looks ready to return to action. Hughes struck out six over three shutout innings while giving up two hits and a walk. A return to the active roster in Albuquerque would mean a lot to both the Isotopes and the big league squad, who are both in desperate need of pitching reinforcements.

⬆️ Stock Up:

Outfielder Robert Calaz (no. 6 PuRP) still hasn’t quite found his power swing in Spokane, but he had a very solid week at the plate. Calaz went 9-for-18 with a double, a triple, a home run, and seven RBIs with two walks and only three strikeouts.

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Now tied for last in the Northwest League, the Indians are off to Eugene to play the league-leading Emeralds (San Francisco Giants).

Plenty of runs were scored in a series split against the California League South-leading Lake Elsinore Storm (San Diego Padres). The Fresno Grizzlies are still two games back in their own division behind the San Jose Giants, but they still have one of the better records in the league.

⬆️ Stock Up:Never in a pickle

2025 draft pick and right-handed closer Seth Clausen continues to quietly be an underrated gem for the Grizzlies pitching staff. The 16th round pick pitched a combined 3.1 innings of scoreless, hitless late innings work against the Storm with a strikeout and a walk. Opposing batters are hitting just .122 against Clausen and he currently has a 1.61 ERA over 28 innings this season.

⬇️ Stock Down:Missing the Marcos

Right-handed pitcher Marcos Herrera was a fairly reliable starting pitcher for the Grizzlies last season. In 21 appearances—19 of which were starts—he posted a 3.93 ERA. Unfortunately, this season has been a rough one. Herrera has a 9.28 ERA in 12 starts so far. This week he struggled again. In 4.2 innings he gave up nine earned runs on 11 hits—two of which were home runs—and four walks while striking out four.

Upcoming

The Grizzlies have six game series ahead of them against the Visalia Rawhide (Arizona Diamondbacks).

After a 5-0 week, the ACL Rockies find themselves sitting atop the Arizona Complex League with the best record in the desert. They even had two games in which they scored 14 or more runs.

⬆️ Stock Up:Ugarte A La Carte

First baseman Ronny Ugarte went 10-for-18 at the plate this week with his best game coming against the ACL Giants where he went 4-for-4 with two home runs and four RBIs.

⬇️ Stock Down:More of a concept than a Concepcion

18-year-old righty Kevin Concepcion (no, not the wide receiver drafted by the Cleveland Browns this year) made his first start since joining the Complex League after two solid relief appearances. The start went poorly, with Concepcion giving up six earned runs on seven hits and a walk over just 2.2 innings of work.

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