Domingo Robles, the Pirates’ Top International Pitcher in 2014, is Emerging as a Prospect

BRISTOL, Va. – One of the absolute best things about rookie leagues like the Appalachian League is that relative unknown prospects can emerge now that they have left Pirate City and gain exposure. This can happen because of age, physical development, and the sheer difficulty of projecting how young men will grow into baseball players.

Signed for $175,000 in the 2014 international free agent class, Domingo Robles comes to Bristol after mediocre results in the GCL in 2016, but he’s showing enough growth in 2017 to land himself on the prospect map with the ceiling of a #5 MLB starter or reliever—a great outcome for a relatively small investment in the international market.

I saw the slender 6’ 2″, 170 pound lefty July 7th against Pulaski and came away impressed with his three-pitch mix and strike-throwing ability. He was dominant through five innings, striking out six and giving up only two hits and no walks before hitting a rough spot in the 6th when his command slipped (and the defense behind him didn’t help).

Robles repertoire begins with both a two- and four-seam fastball. The latter comes in 91-92 MPH and provides a different look than the more effective 88-90 two-seam, which he located devastatingly well down in the zone with above-average sink. The two-seam generates weak contact, some swing-and-miss, and sets up his strong curveball/changeup combination of secondary pitches. He attacked the zone with it and was ahead of hitters throughout.

“One thing he does really well is keep the fastball down in the zone. I think he only had a small handful of misses up [in the start], and that’s how he’s been for us so far,” said pitching coach Joel Hanrahan.

Long-term, Robles’ mid-70s curveball with steep 12-6 drop is likely to emerge as his best secondary pitch, and the pitch has been a key development focus in 2017.

“The coaches asked me to really focus in this outing on tightening my curveball and throwing it correctly so it’s a better pitch for me,” said the slender teenager.

Hanrahan was quite happy with Robles’ July 7th outing, particularly the better curveball he showed.

“He’s done a real good job,” Hanrahan said. “We’ve been working with him on his curveball. We’d like to see him do more of what he did in this outing, bounce it on the plate, strike guys out. We’re still working on tightening it up, which will make it break sharper and the velocity should go up a little.”

Robles also has great trust in his 83-84 MPH changeup, noting that it has been his preferred secondary pitch. He threw it less than the curveball in this outing given his developmental focus, but I project it to be an average MLB pitch at maturity.

All told, Robles projects to have an above average (FV 55) fastball combination, plus curveball (FV 60) and workable changeup (FV 45-50) at the MLB level if everything comes together. Much will of course depend on the young lefty’s physical growth and ability to sharpen up each of his pitches. As a result, while the upside and projection is similar to his rotation mates Braeden Ogle and Travis MacGregor, Robles comes with more risk.

As Hanrahan notes, “He just turned 19, so he has a lot of maturing to do with his body and growing up. As he gets stronger I see the curveball becoming a plus pitch for him. Really, with all his pitches, I see room for growth.”

Enjoy some video of Robles carving with all three of his pitches working:

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Joel Hanrahan!!! Can he pitch and replace Watson?


One important thing to note is that he is the youngest player on Bristol, and he is much younger than most of the players in the league. There are only a handful of younger pitchers in the entire league, and many of them have been ineffective or worse.


I saw that he was ranked 30th on the MLB prospect watch site and I had no clue who this kid was. Thanks for the article.

John Dreker

I’d like to take this time to remind people to use the search function on the site if you don’t know who players are:

Signing article:

2015 DSL Preview:

2015 DSL Recap:

DSL Top Players to Watch:

2016 GCL preview:

2016 GCL Season Recap, mentions what he needs to do to improve (spoiler alert: adding velocity is one that he already checked off)

June 22nd Prospect Watch, talks about his recent improvements and led to this particular article:

There are also 60 other articles that mention him on the site, some with live reports from the GCL, Instructs and Spring Training


I had no doubt that he has been mentioned plenty on this site, you guys do a fantastic job. It just hard to keep track of all the players.

John Dreker

It was just a reminder for everyone about how great the search option is on the site. We have published over 18,000 articles and 1,119 pages (trackers, players, payroll, etc) on the site. It’s a massive amount of work and the search option can go through that in seconds.

Blaine Huff

Alright, the trade deadline is approaching…who else saw the name Robles in the headline and got a little excited?


I must say I did notice it at first and felt the same, but was a fraction of a second before I got my drunk brain focused on the word that preceded it 🙂


Saw the name and then read the headline more carefully!


Size reminds me of growing up in Boston with Rogelio Moret, ageing myself, nothing to see here…


Well a Rogelio Moret comparison may be a story, if something peculiar happens to a prospect, during the hot/cold stove… not fitting here, of course 🙂

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