If you blinked, you missed Matt Krook's entire July. The right-hander got selected up from Triple-A Las Vegas by the Athletics on June 21, got lit up enough to get DFA'd by Oakland on July 3, got claimed by the Nationals a day later, pitched in 3 games for Washington, and then got DFA'd again on July 12 when the Nats needed a spot for a call-up. That's 3 organizations touching one bullpen arm inside of a month, which is basically the platonic ideal of replacement-level chaos at the trade deadline.
The kicker: Krook cleared waivers this time. No team wanted to pay to keep him on a 40-man in the middle of deadline roster crunches, so Washington tried to slide him outright to Triple-A Rochester. But because Krook had already been outrighted once before in his career, he had the contractual right to say no thanks and hit free agency instead — and per MLBTradeRumors, that's exactly what he did.
MLBTradeRumors confirmed the move Tuesday: Matt Krook has elected free agency.

For context on how rough this stretch actually was: across his time with the A's and Nationals this season, Krook posted a 12.79 ERA in just 6 1/3 innings. That's the kind of line that gets you designated twice in 10 days no matter how many teams are scavenging for cheap bullpen depth in July.
Krook's whole path to the majors has been a grind. Miami drafted him in the first round back in 2013 out of high school, he didn't sign, went to college instead, and the Giants eventually took him in the 4th round in 2016. San Francisco flipped him to Tampa Bay, and he bounced through the Yankees and Orioles organizations before landing in Oakland's system — with a brutal 24.75 ERA debut for the Yankees along the way. This is a guy who has scraped for every big league opportunity he's gotten.
None of this is a marquee trade-deadline story on its own — Krook isn't walking into a rotation gig or a save role anywhere. But it's a reminder of how much roster churn happens under the radar every deadline stretch. Contenders are hoarding controllable pitching, rebuilding clubs are auditioning no-cost arms, and guys like Krook get shuffled through DFA purgatory as collateral. Now he's a true free agent, free to sign wherever's willing to give a live arm one more look before rosters lock in for the stretch run.