The Little-Known D-backs Prospect Nearing His MLB Debut
Manuel Pena is still an unknown commodity in the Diamondbacks' system. If he keeps raking like he has been all year, that won't last long.
Time and time again, we baseball/prospect enthusiasts are gifted a brand new gem that has yet to be uncovered. A lot of times, it is not until they have made their MLB debut, or right before their call-up, that we hear their names for the first time.
The latter happens to be the case here with a prospect in the Arizona Diamondbacks system who has been making minced meat out of minor league pitching this year.
D-Backs infield prospect Manuel Pena has been unconscious this year through two levels down in the D-Backs farm system. Through 73 games this season, Pena is hitting .312/.358/.624 with 27 home runs, 72 RBI, a 127 wRC+, and a 48.9% Hard-Hit percentage in Triple-A Reno alone.
The 27 home runs so far would put him at a darn near 60 home run pace on the season. A big contributing factor to the power surge he is experiencing this season is due in a large part to the uptick in his new approach to lifting the ball more. To this point in the season, between the two levels he has appeared in, he is sporting a 39.8% flyball percentage, which would easily clear the previous career-high mark of 34% he put up in his first full season played in 2023.
I don’t think this needs to be mentioned because of the obvious jump in home runs, but the home run-to-fly ball rate skyrocketed from 14.3% last year to 28.7% this season. It’s absurd just how much of a jump he has taken in a simple change of approach.
This is a player who, prior to entering his age-22 season, had only amassed a career-high 14 home runs in 106 games last season in Double-A. Before his promotion to Reno, in his first 36 games of the season, Pena had posted an OPS of .963 and a .634 slugging percentage. There was arguably no one hotter down in the minors than him. He was also the first player in all of the minor leagues to reach 20 home runs on the season. A feat he reached by the end of May.
Manuel Pena’s Origin Story
The Diamondbacks were able to snag Manuel Pena during the 2021 International Signing period after handing him a $1.2 million signing bonus. It was clear he was a priority for Arizona during that period after they allocated over 50% of their pool that season on just one player.
Though we only have the small sample size of Statcast data from his time in Triple-A this season, there are still a few markers that stand out and are likely the key cog towards triggering this breakthrough.
Before dissecting the rest, I do want to focus on one Statcast marker. The aforementioned 48.9% Hard Hit percentage is impressive. Pena is generating this at just a 4.4% barrel rate, which makes it even more impressive.
Per MLB.com, the definition of a hard-hit ball is: “Any batted ball with an exit velocity of 95 mph or higher.”
So, the fact that he can generate such a high mark with the single barrel he has been awarded by Statcast is unheard of. Through his 15 games in Triple-A, the 36 events tallied have him sitting at a 89 average exit velocity and a max EV of 109.1 MPH.
Another grouping of numbers that stands out is the rollercoaster ride between his Swing and Contact percentages.
You can clearly see the yo-yoing in these two specific columns. How is it that his Contact% has dropped from right under 75% last season to the combined 72.3% between two levels this season? Well, simply put, it’s his quality of contact that is playing a large part in this season’s breakout for the youngster.
There weren’t many, if any, prospect publications that ranked Pena coming into the 2026 season. Now, as we enter the month of July, we are finding out that many of us were wrong in doing so.
Coming into July 6, the Diamondbacks are sitting just below .500 at 44-45. The 14-game gap between them and the first-place Dodgers isn’t likely a favorable feat to overcome, but being just 4 games behind the Cardinals and Marlins, who are currently tied for the final wild-card spot, is an expectation that the team likely feels needs to be attained.
Where Would Pena Fit on the Diamondbacks?
Where does Manuel Pena fit in this lineup? Honestly, just about anywhere.
Just this season alone, he has spent time at third, in the outfield, at second base, and at first. Arizona currently has a gaping hole at first base, which has yet to be filled. Pavin Smith has not looked like himself after recently making a return from his lengthy IL stint. José Fernández was a fun story, but his leveling out had him sent back down to Triple-A. Even Tyler Locklear is still trying to fight his way out of Reno.
Pena looks to be the next player to get an opportunity to try and fill the team’s void. Given that he is of the same handedness as Smith, there isn’t much of a left/right platoon option.
I mentioned Fernández earlier, and it’s uncanny just how similar their paths have been so far. Coming into last season, Fernández had only five plate appearances in Double-A before breaking out and landing himself on the Diamondbacks’ 40-man roster. He later solidified his place in the organization with a strong spring training, which led to his MLB debut in April.
Pena is becoming somewhat of a super-utility man for this organization. That, combined with the insane production at the plate, is going to be the reason why he will make his debut in Arizona this season.
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Written by
Cristian has been at Just Baseball since 2021, when he first started writing about prospects. He spent eight years working in Major League Baseball with the…