The Arizona Diamondbacks acquired third baseman Nolan Arenado, an eight-time All-Star and one of the most recognized defenders in Major League Baseball, on Tuesday in a trade with the St. Louis Cardinals that aims to bolster a team seeking to return to the playoffs after their surprising appearance in the 2023 World Series.

In exchange, St. Louis received minor league pitcher Jack Martinez. In addition, the Cardinals will send $31 million to Arizona to offset part of Arenado's contract, which still owes him $42 million over the next two seasons. The Diamondbacks will cover the difference. Arenado, a 10-time Gold Glove winner, played the last five seasons with the Cardinals and had been on the market since the end of the 2014 season. At 34, he is no longer the dominant hitter of his prime, but he remains a valuable asset due to his experience and defensive impact, especially after Arizona traded Venezuelan Eugenio Suarez at last season's trade deadline. “We've always liked the way he plays baseball and the impact he can have even when he's not hitting,” said Diamondbacks general manager Mike Hazen. "I think he's a good fit here. I know how important winning is to him, and that's important to us too."

Contract, Role, and Context of the Move

Last season, Arenado batted .237 with 12 home runs and 52 RBIs. He has two years and $42 million remaining on his nine-year, $275 million contract. He is scheduled to earn $27 million this year and $15 million in 2027.

St. Louis agreed to send $22 million to cover part of this season's salary, distributed in monthly payments between April and September, plus another $9 million to be paid on November 1, 2027. To finalize the trade, Arenado agreed to waive his no-trade clause.

“We are grateful for Nolan's five years as a Cardinal, on and off the field, for his drive, “His competitiveness and all the memories he left us with,” St. Louis president of baseball operations Chaim Bloom said in a statement: “Looking ahead, we're happy to add another exciting pitching prospect to the organization and excited about the opportunity this move creates for several players to take a step forward in the major leagues.” In Arizona,Arenado is projected to be the starting third baseman, with young options like Blaze Alexander and Jordan Lawlar capable of covering other positions, including second base, shortstop, and the outfield. The move is reminiscent of 2023, when Hazen signed Evan Longoria, a veteran who provided occasional power and defensive solidity during the run to the World Series. “We expect him to be a solid offensive contributor in our lineup,” Hazen said of Arenado. “With the power we have at the top of the lineup, we don't need him to carry the offense.” “What we need is for him to stabilize and strengthen our defense, and that's key for us.” Arizona has also evaluated alternatives at first base. Hazen didn't rule out Arenado eventually playing that position, although I have clarified that they will first need to analyze roster construction with the player.