What happened: MLB Network's Jon Heyman identified Aroldis Chapman as potentially the best closer available on the trade market, with the Boston Red Sox expected to be active in the coming month. The veteran left-hander has surfaced repeatedly as a name to watch ahead of the deadline.

Why it matters: A reliable closer is among the most coveted commodities for contenders building bullpen depth, and Chapman's availability would give Boston a clear chip to move. The framing reinforces a sell-leaning posture for the Red Sox as they weigh their deadline direction.

What to watch: Watch for which contenders engage Boston on Chapman and whether the Red Sox signal buy or sell as the deadline approaches.