Diamondbacks Land Nolan Arenado in Blockbuster Deal With Cardinals - What It Means for Both Teams
In one of the most talked-about moves of the MLB offseason, the Arizona Diamondbacks have acquired veteran third baseman Nolan Arenado from the St. Louis Cardinals in a significant trade that reshapes both clubs’ 2026 outlook
The deal, finalized on January 13, 2026, sends Arenado one of the game’s elite defenders and a perennial All-Star to Arizona in exchange for 22-year-old right-handed pitching prospect Jack Martinez. Financially, the Cardinals will absorb the majority of Arenado’s remaining contract, sending approximately $31 million to help facilitate the move, while the Diamondbacks are on the books for a smaller share of the remaining salary over the next two seasons
Why This Trade Matters: Diamondbacks Get Veteran Leadership
Arenado, a 10-time Gold Glove winner and eight-time All-Star, brings elite defensive skills and veteran presence to a D-backs lineup that has been searching for stability at third base since trading Eugenio Suárez
Although his offensive numbers dipped in 2025 - hitting just .237 with 12 home runs and 52 RBIs - his reputation as one of baseball’s premier fielders remains intact. Coming to Chase Field, a more hitter-friendly environment compared to Busch Stadium, could reinvigorate Arenado’s bat and add depth to Arizona’s playoff push
General Manager Mike Hazen hinted that this move signals the Diamondbacks’ intent to compete in the National League West, adding a seasoned veteran to mentor younger talent and solidify infield defense
Cardinals Turn the Page With Youth and Payroll Flexibility
For the St. Louis Cardinals, the trade represents a continuation of their rebuild under new leadership. By moving Arenado’s contract and acquiring a young arm in Jack Martinez, St. Louis gains payroll flexibility and opens up opportunities for emerging players, particularly at third base
Martinez, drafted in the eighth round of the 2025 MLB Draft out of Arizona State, hasn’t yet pitched in professional ball, but he brings intriguing raw skills including a fastball that touches the high 90s that could be developed within the Cardinals’ system
President of Baseball Operations Chaim Bloom praised Arenado’s contributions to the Cardinals franchise during his tenure, recognizing both his competitive edge and leadership while emphasizing the club’s focus on the future
Financial Details That Sealed the Deal
This trade was made smoother thanks to the financial arrangement between the teams and even the Colorado Rockies, who remain on the hook for a portion of Arenado’s deferred salary. Reports show the Rockies will contribute to a $5 million chunk of his pay, further reducing Arizona’s burden
With two years and roughly $42 million left on Arenado’s contract, the Cardinals’ willingness to cover the bulk of the money was crucial in securing a return even if modest rather than releasing one of MLB’s most decorated third basemen without compensation
What’s Next for Both Teams
For the Diamondbacks, Arenado will likely slide into the heart of the infield and immediately become a clubhouse staple. His veteran presence could help younger players reach new heights and offer clutch defense in tight divisional races
Meanwhile, the Cardinals are expected to continue reshaping their roster, with additional trades likely as they build toward a more cost-controlled, homegrown core
