What happened: Miami followed a 20-6 June with a franchise-record 12-game skid, while Boston climbed from 32-46 to 55-50 in one month. Luis Arraez, Luke Weaver, Robbie Ray, Michael Wacha, Mason Miller, Tyler Stephenson and Foster Griffin are among the players who could shape the market.
Why it matters: Rapid swings in the standings complicate decisions for clubs weighing a postseason push against selling. Expiring contracts create pressure to recover value, while players under control beyond 2026 could command larger returns.
By the numbers: Arraez has 3.1 WAR and a 136 adjusted OPS despite four homers. Since June 1, Weaver has allowed two hits and no earned runs in 14 appearances, with 19 strikeouts against three walks; Wacha owns a 1.19 WHIP, and Griffin has 10 wins with a 2.77 ERA.
What to watch: Detroit's direction and the next results for Miami, Boston and Seattle could clarify the market. Contract terms and no-trade protections will also influence which talks advance.