MLB waivers are the league’s mandatory marketplace: before a club can remove a player from its 40-man roster and send him to the minors, every other team gets a chance to claim him – contract included. The modern wire is irrevocable (no take-backs), sorted by worst record first, and busiest in the days after every DFA.
The system got dramatically simpler in 2019, when the league killed revocable trade waivers and the August waiver-deal circus with them. What remains is clean: outright waivers to exit the 40-man, release waivers as a formality, and a claim order that hands struggling teams first pick of everyone else’s castoffs.
The chart below walks the process and the taxonomy.
The Wire in Motion
Most waiver activity starts with a DFA: the club needs a 40-man roster spot, designates a player, and places him on outright waivers during the seven-day window. Claims are filed blind, priority runs from the worst record up (same-league clubs first), and a successful claim transfers the player and his contract instantly. No negotiation, no compensation – the claiming club simply pays the freight from here.
Why Clearing Waivers Matters
An unclaimed player “clears” – and clearing is what unlocks the outright assignment to Triple-A, keeping him in the organization but off the 40-man. That’s the whole point of the exercise for the waiving club. The catch is veteran refusal rights: players with three-plus years of service or a prior outright can decline the assignment and elect free agency, which is why clearing waivers doesn’t always mean staying put. Players still on options rarely reach the wire at all – they can simply be optioned down, no waivers required.
What Died in 2019
The old system had a second, stranger species: revocable trade waivers, required for any August deal, which teams used to play chicken – waiving stars to gauge interest, pulling them back when rivals claimed, occasionally dumping a contract on an overeager claimer. The 2019 move to a single trade deadline extinguished all of it. Today’s wire has no bluffing: every waiver is live, every claim is final. (Fans of roster chaos can console themselves with the NFL’s waiver system, where claim-week drama survives.)
Quick Answers
How do MLB waivers work?
A club exposes a player (and his contract) to all other teams; claims resolve by worst record first, same league ahead of the other, and the claim is irrevocable.
What happens when a player clears waivers?
He can be outrighted to the minors off the 40-man – unless he has veteran refusal rights and elects free agency instead.
Do teams get anything for a claimed player?
No compensation – the claiming club assumes the contract, and the waiving club gets the roster spot and salary relief.
The Bottom Line
MLB waivers = the irrevocable exit toll from the 40-man roster: every club gets a shot, worst records first, contracts travel with players. Simple since 2019, busy year-round, and the engine behind every DFA’s second act.