​PHOENIX, ARIZONA – JUNE 14: Geraldo Perdomo #2 of the Arizona Diamondbacks is congratulated by Pavin Smith #26, Gabriel Moreno #14 and Corbin Carroll #7 after scoring the game-winning run against the San Diego Padres during the ninth inning of the MLB game at Chase Field on June 14, 2025 in Phoenix, Arizona. The Diamondbacks defeated the Padres 8-6. (Photo by Christian Petersen/Getty Images) | Getty Images Welcome to SB Nation Reacts, a survey of fans across the MLB. Throughout the year we ask questions of the most plugged-in Diamondbacks fans and fans across the country. Sign up here to participate in the weekly emailed surveys.The first half for the D-backs was definitely a mix of the good, the bad and the ugly. Focusing purely on the first of these, the positive side of performances came from players both expected and surprising. But who was the team’s MVP? That’s what this week’s poll is designed to determine. I’ll leave the exact definition of “MVP” entirely up to you to decide. Factors you may – or may not – decide to include in your assessment include things such as playing time, production, salary, intangible contributions and expectations. Here’s a quick run down of the five candidates…Corbin CarrollDespite a late slump at the plate. Carroll still finished the first half with the highest OPS of any Diamondback (min 50 plate-appearances). His 42 extra-base hits also led the team, and he was responsible for almost half of all Arizona’s triples before the break: Carroll = 10, everyone else combined = 11. He set the all-time franchise mark for three-baggers, passing Stephen Drew’s career total of 52, in almost eight hundred fewer PAs. Carroll started 93 games in the first half, most on the team. Gabriel MorenoWhat’s impressive about Moreno’s season is no just that he ranks close to the top of the club by both bWAR and fWAR. It’s that he is doing so, despite missing three weeks and sixteen games with a strained left oblique. He has been incandescent at the plate. Over the two months (and almost 200 PA) leading up to the All-Star break, Moreno had a slash of .341/.434/.479 for an OPS of .913. He also had more walks (27) than strikeouts (25) in that time. All that, plus managing the pitching staff and making ABS challenges too. Geraldo PerdomoExpecting Perdomo to live up to his MVP-caliber season of 2025, was probably optimistic. But after a slow start – through his first 20 games he was hitting below the Uecker Line, with an OPS in the five hundreds – Perdomo has got things back on track. His plate-discipline remains as stellar as ever, with his 59 walks leading the team, and compared to only 49 strikeouts. He continues to be well-rated by the defensive metrics: Fangraphs Def currently has Geraldo at +11.3, sixth-best in the majors.Eduardo RodriguezExpectations for Rodriguez were low, despite his high salary. After all, in both 2024 and 2025, his ERA was above five. But this year has been a revelation. His 2.2