Monday Rockpile: Chase Dollander and Antonio Senzatela are settling into the Rockies bullpen

SAN DIEGO, CA - APRIL 09: Chase Dollander #32 of the Colorado Rockies pitches during the game between the Colorado Rockies and the San Diego Padres at Petco Park on Thursday, April 9, 2026 in San Diego, California. (Photo by Ryan Levy/MLB Photos via Getty Images) | MLB Photos via Getty Images

Antonio Senzatela and Chase Dollander are two very different pitchers, but both have found themselves transitioning from starting to long relief over the last year.

For Senzatela, the move came after struggles over the last few seasons that saw him returning from a variety of health challenges, including Tommy John surgery. Finally in August, the Rockies re-envisioned his role as a pitcher and moved him to the bullpen. He had a chance to regain his spot in the rotation this spring, but was ultimately returned to the bullpen because he was not stretched out after his participation for Team Venezuela in the World Baseball Classic.

Although Dollander did not experience Senzatela’s physical challenges, he struggled in 2025 to be an effective MLB pitcher. In the spring, he battled against Ryan Feltner for the fifth opening in the starting rotation. Feltner ultimately won the job, and Dollander was kept on the roster as another long reliever. The Rockies see him as a starter long-term, but felt like this was the best way to allow him to progress.

“We want Chase to develop at the big-league level, too, and feel like facing big-league hitters on a consistent basis is going to lead to his development better than it would in Triple-A at this point,” manager Warren Schaeffer said of the move at the time.

So far, through 15 games, both players have been thriving in different ways and are adjusting to their 2026 roles. Senzatela has made four appearances and has thrown nine innings while allowing just two hits with three walks and 12 strikeouts. Dollander has also made four appearances, allowing seven runs (all earned) on 14 hits with three home runs, four walks and 14 strikeouts over 13.2 innings.

“It’s different, for sure,” Dollander said. “When that phone rings, your heart gets pumping pretty quick. I mean, you have an idea of when you’re going to pitch, but you don’t have a definite clue of, ‘Hey, I’m pitching today’ It’s so funny when the phone rings because everybody’s just looking over at [Matt Buschmann] to see if it’s them being called.”

Senzatela has experience in the bullpen both from last season and from the WBC, but is feeling more comfortable.

“(The WBC helped) for sure,” Senzatela said. “Even last year, I threw a couple innings as a bullpen guy. I’m out there with the high-leverage situations, it gives my heart a little bump. So right now, it feels really good being in the bullpen and having that experience.”

And he has made some adjustments to his routine, knowing what his role is on this team.

“(I’ve made) different changes, because right now I have to be ready for any game everyday,” he said. “So I do like working and doing some stuff before heading out. It’s different, but it’s good. I’m feeling great right now.”

Additionally, Senzatela has made some sweeping changes to his arsenal – something that’s been limited for most of his career. Historically, Senzatela has used his four-seam fastball more than half the time. Now, he has six pitches and uses his four-seamer about one-third of the time instead.

“I was working in the (Push Performance) facility in Arizona,” he said. “We added two pitches, and we’re still working on it, but so far so good.”

Dollander hasn’t made a lot of changes, but he’s been getting good advice from Buschmann throughout the game.

“It’s awesome,” he said. “He and I have had some really good conversations, just whether it’s just about life or if it’s about, ‘Hey, this is what your routine needs to look like’ or if he has suggestions as to what I should do to get warmed up for the game, or if he thinks that I’m going to be in the game today or not. He’s really smart with that kind of stuff.”

And Dollander and Senzatela have turned to each other since they’re both in the same boat of being starters-turned-long-relievers.

“We’ve talked a little bit,” Dollander said. “We’ve both said it’s very different from starting, but at the same time, it’s a lot more fun. Well, not more fun – starting is really fun and being in the bullpen with all the guys is really fun, too. There’s definitely different aspects of it, but I think we’re both just trying to have fun with it, to be honest.”

“I just started (saying) we need to be ready for any time,” Senzatela said. “We’ve enjoyed time together out there and we’re just trying to be the best we can on the mound so we can have another opportunity.”

Schaeffer has noticed a change in Dollander so far in his new role, and he likes what he sees.

“I think any big spot that you’re going to see Chase in and you see results like that, and he continues to attack the zone, I think is maturation for sure,” Schaeffer said last Saturday. “The other part that I liked with him tonight is the consistent one line to the plate. I mean, that’s a different Chase to enter this year.”

And specifically, he doesn’t see these long relievers as ‘eating innings’ – he sees them as an important part of the entire pitching staff.

“I think it’s huge, specifically in April in Coors Field,” Schaeffer said. “It takes a load off of our bullpen to be able to do that and to have guys go out there and attack the strike zone. Hopefully we see a more rested bullpen in August and September because of this. But it’s not just eating innings with these guys. Those were high-leverage innings for Chase. That’s not eating, he’s out there to get a win.”

In addition, Dollander is learning important lessons in the bullpen that he can take back with him to the rotation.

“I think for me, it’s going to be just the mindset of staying on the attack and being aggressive,” he said, “because when you come out of the pen, it’s like, ‘all right, you have this many innings to work with and you need to get through those innings.’ So I have to come out with my best stuff and I’m going to be aggressive with it.”

But most importantly, “last year, obviously, is what it is and you can’t change it. But this year, I’m very, very much more confident in my abilities and myself just because of all the work that I’ve put in this offseason.”

There hasn’t been any indication of when Dollander will return to the rotation, but both he and Senzatela have made the most out of their opportunities and will hopefully continue to do well in their current roles.

On the Farm

Triple-A: Albuquerque Isotopes 19, El Paso Chihuahuas 12 (F/10)

While the Rockies had an anemic offense in San Diego, the Isotopes had the opposite. They racked up 19 runs on 17 hits against the Chihuahuas’ 12 runs on 13 hits. Cole Carrigg (No. 4 PuRP) went 3-for-5 with a home run, three runs scored and four RBI. Ryan Ritter went 1-for-6 with a home run, two runs scored, two RBI and two strikeouts. Zac Veen (No. 9 PuRP) went 2-for-6 with two runs scored, one RBI and one strikeout. Charlie Condon (No. 1 PuRP) continued his torrid Triple-A affair, going 3-for-5 with two runs scored, three RBI, one walk and one strikeout. He also hit a three-run homer, his fourth in 10 games. On the pitching side, Sean Sullivan (No. 8 PuRP) went six innings and allowed five runs (two earned) on seven hits with four strikeouts and two home runs. Welinton Herrera (No. 17 PuRP) ended up with the win, though, after he pitched two innings with nothing but three strikeouts.

Double-A: Reading Fightin’ Phils 6, Hartford Yard Goats 3

The Yard Goats came up short against the Fightin’ Phils. Aidan Longwell, Conner Capel and Andy Perez all recorded two hits, and Capel also had an RBI (as did Skyler Messinger). The third run was scored on a throwing error in the first inning. On the pitching side, only Cade Denton pitched unscathed. Granted, he only pitched 0.1 innings, but the other three pitchers all gave up at least one run (Eiberson Castellano and Alberto Pacheco each gave up multiple).

High-A: Hillsboro Hops 5, Spokane Indians 2

The Indians also came up short against the Hops, going 1-for-9 with RISP and leaving 12 men on base. Jacob Humphreys and Alan Espinal each recorded two hits, while Robert Calaz (No. 6 PuRP), Kevin Fitzer and Kelvin Hidalgo each recorded one. The worst thing, though, is that the Indians struck out 17 times. The Indians used two pitchers — LHP Everett Catlett and RHP Hunter Mann — and neither escaped unscathed.

Low-A: Fresno Grizzlies 11, Stockton Ports 1

The Fresno Grizzlies were outstanding last night. The pitching staff combined for just five hits and 13 strikeouts without walking a single batter and only allowing one run. Angel Jimenez gave up the run — a single in the third to Bobby Blandford — but Ethan Cole and Austin Emener shut things down. Emener in particular pitched two innings without allowing a single hit while striking out four. On the offensive side, Jack O’Dowd and Matt Klein each home runs. Roldy Brito (No. 11 PuRP) hit a triple and Luis Mendez hit a double. Brito, Klein and O’Dowd also each had two RBIs. Offensively, they struck out seven times.

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