What happened: Miller is with San Diego and has surfaced as a potential trade chip with the club 3.5 games back. Skubal is in the final year of club control, increasing the pressure on Detroit to make a decision.

Why it matters: Moving Miller would force San Diego to balance its playoff chase against the return for an elite closer. Detroit could lose Skubal to free agency after the season if it keeps him past the deadline.

What to watch: San Diego's place in the playoff race and Detroit's handling of Skubal will determine whether either market advances.