What happened: MLB.com says interest in Mason Miller continues as clubs search for high-end bullpen help. A deal would require a premium return, with skepticism that a strong enough offer will materialize.

Why it matters: Scarcity gives Miller's market added leverage in the deadline's final days. His performance and remaining club control raise the cost of moving him.

What to watch: The next five days will show whether an aggressive offer can overcome the steep asking price.