Diamondbacks 2026 Season Grades: Bullpen Shines, Rotation Struggles

As the 2026 Major League Baseball season wrapped up, the Arizona Diamondbacks found themselves reflecting on a campaign of stark contrasts. Finishing with a solid 86-76 record, the team ultimately fell short of the postseason for the third consecutive year.

This comprehensive report card breaks down every facet of the roster, from stellar bullpen performances to glaring offensive weaknesses. Fans tracking similar competitive shifts across the league often check out our Baseball News archives for deeper context.

Evaluating the Pitching Staff: Rotation Struggles vs. Bullpen Brilliance

Pitching proved to be a tale of two entirely different units in the desert this past season. While one half of the pitching staff carried the load, the other plagued the team with persistent inconsistency.

The Starting Rotation Grade: C-

The starting rotation received a disappointing C- grade due to rampant instability throughout the grueling 162-game schedule. The club suffered from a heavy reliance on Eduardo Rodriguez alongside devastating injuries to key arms like Zac Gallen and Merrill Kelly.

The Bullpen Grade: A

Conversely, the bullpen earned a stellar A grade by leaning heavily on a remarkably successful closer committee strategy. This relief corps finished an impressive fifth in all of baseball for Win Probability Added, anchoring late-inning victories.

Assessing the Positional Play: Outfield, Infield, and Behind the Plate

Moving across the diamond, the position players presented an equally mixed bag of elite individual achievements and glaring offensive voids. Roster construction will undoubtedly focus on patching these specific holes during the upcoming winter months.

Outfield and Infield Performance

The outfield secured a C grade, perfectly balancing Corbin Carroll’s strong production and defensive stability against a general lack of offensive depth. Meanwhile, the infield locked down a respectable B grade, highlighted by Nolan Arenado’s resurgent 30-homer season and Geraldo Perdomo’s elite defense at shortstop.

Despite those bright spots, the infield unit still struggled with a massive offensive void at the first base position. Similar roster evaluations happen franchise-wide, much like the strategic rebuilds analyzed within our Chicago Cubs coverage.

Catchers and Designated Hitter Grades

Catchers easily claimed the highest marks on the team with a sparkling A+ grade anchored by Gabriel Moreno. Moreno captured the prestigious National League batting title, complemented brilliantly by reliable backup contributions from veteran James McCann.

On the flip side, the designated hitter position completely floundered, earning a dismal F grade after finishing second-to-last in fWAR. A miserable collective .631 OPS out of the DH spot effectively torpedoed any hopes of late-season offensive surges.

Looking Ahead to the Future

To break their three-year playoff drought, the front office must address the glaring discrepancies highlighted in this 2026 report card. Fixing the designated hitter role and stabilizing the starting rotation will be paramount for future success.

Supporters eager to read more player evaluations and historical breakdowns can browse our extensive Biographies section for more insights. The road back to October contention starts now in Arizona.

 
Here is the source article for this story: Grading Every Diamondbacks Position Group After 2026 Season