Diamondbacks 12, Giants 2: Arenado Grand Slam Sparks Four-Run First Off Former Teammate Ray

The lead

May 18, 2026 - Phoenix - The Arizona Diamondbacks ambushed former Arizona ace Robbie Ray for 10 runs (nine earned) before the fifth inning ended, riding Nolan Arenado's first-inning grand slam and a five-run fifth that featured Gabriel Moreno's two-run homer, per AZ Snake Pit's detailed recap and MLB.com's final.

Zac Gallen set the tone with a tidy top of the first, letting an offense explode for four runs inside half a dozen pitches afterward, columnist notes echoed. Arenado stepped in cleanup and cratered Ray's ERA line—only Arizona's second-ever slam from that lineup slot within inning one, per Snake Pit trivia.

How the game turned

Ketel Marte and Corbin Carroll singles plus Gerardo Perdomo reaching on error set the tableau before Arenado emptied the sacks. Later, Moreno's drive during the fifth signaled the game's non-competitive midpoint.

Pitching and matchup notes

Ray's Game Score 2 was cited as worst-of-career in Snake Pit; Gallen stabilized with crisp early work en route to 16 pitching FP in AthX Engine grading while Diamondbacks hitters inflated 25 team FP—fourth on Monday's leaderboard.

Bats that changed the board

Arizona collected traffic top-to-bottom; San Francisco mustered consolation noise without denting Gallen's dominance narrative or the avalanche already completed.

AthX Engine fantasy angle

Starter efficiency plus avalanche innings push team FP even when pitching lines are middling nationally; Arenado-and-Moreno contact spikes matter as much here as walks allowed. Separate that output from dynamic pricing signals.

What comes next

The Giants sort Ray's arsenal issues on short rest chatter while Diamondbacks outfielders savor a rivalry rout that bumped their record to roughly 23-23, per Snake Pit.

*Sources: MLB.com schedule, MLB gameday wrap, AZ Snake Pit recap, AthX Engine scoring. Information only; not financial advice.*