Mile High Minors: Veen's AAA rampage forces the question, Arguelles makes ACL history
By Cameron Wright ·
The Question Has an Answer and another Question
Zac Veen (AAA, LF, Rank: 7) went 11-for-27 last week with four home runs, two doubles, a triple, and 10 RBI. That's not a fluke; his last-30-day line at Albuquerque reads .383/.462/.852 with eight home runs, eight doubles, three triples, and 28 RBI in 20 games. For the season he's at .327/.402/.635 through 100 games with 24 home runs, 33 doubles, and 18 steals, a massive jump from his .289/.354/.468 line in Triple-A a year ago. The conversation among Rockies fans this week centered on one question: how long can he stay in Albuquerque? It's a reasonable ask. He's a plus runner with 55 power and a 50 hit tool who is currently hitting like those grades are both undersells.
The persistent concern has been how his swing holds up against top-end velocity and quality spin. His leg lift and long levers have caused timing breakdowns in prior MLB looks, and a 12-game cameo in 2025 produced a .118 average with 14 strikeouts in 37 plate appearances. The current version at Triple-A is more composed, and the 48 walks against 91 strikeouts on the season show a disciplined approach rather than a free swinger padding a damage-inflated environment. His realistic ceiling remains a .260-.270 hitter with 20-25 home runs and double-digit steals, but he's running well ahead of that right now. With the Brenton Doyle trade opening the outfield door in Colorado, continuing to let Veen hit four home runs per week at Albuquerque isn't a development plan; it's just delay.
There is still a crowd in the Colorado outfield mix. Mickey Moniak was just extended and is primarily playing DH. Jake McCarthy is on fire right now. Cole Carrigg is a speedy switch-hitter that adds value on defense and has a 122 wRC+. Jordan Beck would be a good candidate to platoon against left-handed pitching. The Rockies just recalled Connor Norby as Tyler Freeman hit the IL. It is unclear what their intent is with Veen. He was an uber-prospect and 9th overall pick that re-made his body over the offseason. That usually comes with the reward of another shot. Why hasn't Veen gotten that shot?
Arguelles Is Already Rewriting the Rulebook
Cristian Arguelles (A, OF, Rank: 10) drove in four runs on 10 hits across 27 plate appearances last week, drawing four walks against only four strikeouts. That line fits neatly into a broader stretch that has him slashing .372/.444/.593 over his last 21 games at Fresno since his promotion from the ACL. Before that jump, he became the first teenager in ACL history to hit over .400 in a full season, leading the league in hits, extra-base hits, RBIs, slugging, and OPS. His combined numbers across both levels sit at .390/.469/.652 with 11 home runs, 18 doubles, 9 triples, and 81 RBI in just 68 games. The 19-year-old is a contact bat with a 55 hit tool and an advanced left-handed swing that lets him use the whole field without sacrificing contact quality.
The evaluation grades him as a future up-down type with left-field projection and average power, and there's nothing wrong with framing a 19-year-old that conservatively. But the underlying indicators argue that the hit tool may already be ahead of schedule, and the power, while sitting around 50 on the current sheet, is showing up in games more than his ACL background suggested it would. His walk rate is real; 38 walks against 38 strikeouts on the season is a contact-and-patience combination that far exceeds what most teenagers deliver against professional pitching. The defensive limitations are real too: a 45 arm and 45 field grade restrict him to left field, so the bat has to carry the profile. Through 309 plate appearances in 2026, it absolutely is.
Quick Hits
Roldy Brito (A+, 3B, Rank: 3) · went 11-for-24 with four doubles, two home runs, and four RBI in his best week since his promotion to Spokane. The 19-year-old switch-hitter is a contact bat with 70 speed and a 55 hit tool; combined across Low-A and High-A this year he's hitting .320/.378/.492 with 31 steals in 99 games, though the 23 strikeouts this week at A+ are worth watching as he faces more advanced pitching. His limited over-the-fence projection has always been the cap on the profile, but the speed and contact have never been in doubt.
Wilder Dalis (A, SS, Rank: 29) · had eight hits, two triples, a homer, and six RBI in 25 plate appearances, adding a walk and a hit-by-pitch to get on base at a strong clip. His last-30-day line at Fresno is .376/.476/.776 with eight home runs and 30 RBI in 22 games, a stretch that makes the quad-A projection look increasingly stale. He's a switch-hitter with a 50 hit tool whose power output this year, 15 home runs in 72 games, has significantly outpaced the modest 45 power grade on his report. A promotion to High-A would tell us far more than anything happening in Fresno right now.
Aiden May (A+, RHP, Rank: 33) struck out six over 4.2 innings of two-hit ball with one earned run allowed in his first Spokane start. He was recently traded from the White Sox organization, and the new setting is producing results: he's posted a 2.29 ERA with 18 strikeouts over his last four outings across 19.2 innings. He's a 55 fastball/60 slider arm with average command who projects as a back-end starter; through 15 starts this year across two organizations, the ERA sits at 3.68.
Mason Adams (AAA, RHP, Rank: 21) · tossed four scoreless innings with five strikeouts and one walk in his Albuquerque debut after being acquired from the White Sox. The command is the carrying tool here: a 55 grade that helps a fastball sitting 92-94 play above its raw stuff. Over his last four appearances he's allowed four earned runs in 14.2 innings with 16 strikeouts, and the ERA at Triple-A through one start sits at 0.00. He's a long-reliever profile with up-down upside, but he's currently pitching like someone who belongs at the level.
Roc Riggio (AA, 2B, Rank: 19) · finished the week with six hits, a double, a homer, and four RBI in 24 plate appearances, drawing three walks but also punching out eight times. His 16 home runs and .492 slugging on the season represent genuine pull-side thump for a second baseman; the 55 walks against 100 strikeouts through 88 games underline the three-true-outcomes lean. The power translates; the contact against premium spin is still the open question as he eyes a potential Triple-A look.
Tanner Thach (A+, 1B, Rank: 43) · went 5-for-20 with two doubles and two RBI while drawing three walks and getting hit twice, reaching base five times without striking out once. The patience is real for a 55 power bat; his 40 walks against 68 strikeouts on the year is reasonable for a corner hitter. His .339/.414/.541 line at Low-A earlier this season looked like a breakout, but the transition to High-A has been bumpy at .207/.280/.371 over 30 games, and how he adjusts to A+ pitching through the rest of August will carry significant developmental weight.
Kelvin Hidalgo (A+, SS, Rank: 25) · posted four hits and a home run across 17 plate appearances, driving in four while drawing three walks. His last-30-day line of .311/.377/.443 at Spokane is the most encouraging stretch of his season; for context, he hit just .247/.311/.345 in all of 2025 at Low-A with a 32 percent strikeout rate. He's an elite runner with 65 speed who has long had the tools to be a second-division regular if the bat comes around. Two weeks of progress don't rewrite the profile, but they're a start.
Jack Mahoney (AAA, RHP, Rank: 45) · made his Triple-A debut after earning the promotion with a 1.99 ERA across 13 starts at Double-A Hartford this season, striking out 64 batters in 68 innings. His first Albuquerque outing produced 5 innings, 6 strikeouts, and a 3.60 ERA. The jump from Eastern League to the Pacific Coast is one of the most punishing in the minors, so the early returns deserve measured expectations, but the underlying numbers at Hartford were too good to ignore.
Blas Castaño (AAA, RHP, Rank: 51) · was activated from the 15-day IL on August 8 after missing nearly two months with a right pectoral strain, then optioned to Albuquerque the same day. He had posted a 3.92 ERA through 20.2 innings at the MLB level before the injury and a combined 2.84 ERA between Triple-A stints. Worth monitoring as he ramps back up in the Pacific Coast League.
Brody Brecht (A+, RHP, Rank: 16) · was transferred from the 7-day IL to the 60-day IL at Spokane on August 4, a move that effectively ends his 2026 season. Brecht has battled shoulder issues. He is one of the more intriguing throwers in the system. His size and stuff are unquestionable, but the delivery always lacked a fluidity that has led to many of his issues.