TL;DR
- Devin Williams reportedly signed with the New York Mets, a rival of the New York Yankees.
- The Mets acquired Williams on a 3-year deal worth $50 million, per reports.
- This signing raises questions about the future of Edwin Diaz, the Mets' current closer.
- Having two All-Star closers like Williams and Diaz offers the Mets strategic flexibility.
2025年ニューヨーク・ヤンキースでプレイしたデビン・ウィリアムズが、クロスタウンライバルのニューヨーク・メッツと契約したと報じられた。
新たなクローザーを獲得したメッツは、2019年からチームに在籍し、このオフにフリーエージェントとなったオールスター・クローザー、エドウィン・ディアスをどうするつもりなのだろうか。
スポーツニュースサイト『The Athletic』のウィル・サモン氏 が現地月曜夜に第一報を報じると、米ケーブル局『ESPN』のジェフ・パッサン氏は 3年総額5000万ドル（1ドル156円換算で約78億円）になると付け加えた。
Mets, RHP Devin Williams agree to 3-year deal, per multiple reports including https://t.co/Z3s2EphcSH's @Feinsand. Pic.twitter.com/CxMNHcsX2W
— MLB (@MLB) December 2, 2025
In the past, Williams's signing would have certainly signaled the departure of Diaz. No team would have invested such a substantial sum in one closer, only to then spend an equivalent (or greater) amount on another. However, circumstances have shifted considerably. The possibility can't be entirely ruled out.
Williams struggled mightily with The Yankees this season, finishing with a 4.79 ERA, a 1.129 WHIP, and 90 strikeouts over 62 innings. In his last three seasons with The Milwaukee Brewers, he posted a 1.66 ERA, a 0.965 WHIP, and averaged 102 strikeouts per 65 innings. This deal suggests the Mets believe his 2025 season was merely a temporary slump. That may well be true, but it never hurts to have some insurance.
In 2025, Diaz achieved a 1.63 ERA and a 0.874 WHIP. He also recorded 98 strikeouts over 66.1 innings. Since his challenging first year with The Mets in 2019, Diaz has posted a 2.36 ERA, a 0.977 WHIP, and a 14.6 K/9 rate.
As baseball evolves, starting pitchers are increasingly less likely to complete games into the later innings. Completing seven innings, or even six, is becoming a rarity. Consequently, bullpens require a greater number of relief pitchers. Furthermore, managers are now frequently seen deploying their top relief pitchers in high-leverage situations, not just for the ninth inning, to navigate tense moments. Having two All-Star caliber closers on the roster expands these strategic options.
The Mets' acquisition of Williams may not be welcome news for fans hoping for a re-signing of Diaz. However, it's not necessarily a negative development. Having more excellent relief pitchers is always beneficial. At the very least, re-signing Diaz would provide significant insurance for The Mets. And Steve Cohen likely has the financial resources to cover it.
原文：What Mets' latest signing means for Edwin Díaz's future
翻訳・編集：石山修二（スポーティングニュース日本版編集部）
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