How Do August Waiver Trades Work?

Every year there is a ton of hype surrounding the trade deadline, but the big misconception is that teams can no longer make trades after 4:00 PM on July 31st.  Teams can, in fact, make trades after the July 31st deadline.  It’s just not as simple.

The big advantage to making deals prior to the July 31st deadline is that there are no restrictions on deals that can be made.  Teams can trade with any other team, and for that reason, teams can try to maximize the value of the return for their players on the market by selling to the top bidder.  That luxury is removed after the July 31st trade deadline.  Teams are limited to making deals based on the waiver system, and the numerous scenarios that make it difficult to deal in August.  Before I list some of those scenarios, let me first explain how trades work in the month of August.

The Process

August trades are made through revocable waivers.  Any player on the 40-man roster can be placed on revocable waivers.  If the player clears waivers, he can be traded to any team, without restrictions.  If the player is claimed by another team, then his original team has a choice to make:

**They can let the player go to the claiming team, with the new team assuming the remainder of that player’s salary.  We’ve seen this in previous years, specifically when the Chicago White Sox claimed Alex Rios from the Toronto Blue Jays.

**A team can also pull their player back from waivers if he is claimed.  The team keeps their player, although they lose the right to place that player on waivers again.  If a player has previously been pulled off of revocable waivers, and he is placed on waivers again, the team has no choice but to give him up to any claiming team.

**The original team can also work out a trade with the claiming team, which is something that happens frequently.

Note: Players who are not on the 40-man roster don’t have to be passed through waivers.


The claim priority is based on league, and the current standings.  Using the Pirates as an example:

**They currently have the 14th priority in the National League

**Any player waived by a National League team would have to pass through the 13 teams ahead of the Pirates.

**Any player waived by an American League team would have to pass through every AL team, and the 13 NL teams ahead of the Pirates.

Mass Waivers

You’ll hear a lot of rumors about players being placed on waivers.  Pretty much every player in the majors will be placed on waivers this month, with almost all of them being drawn back.  Some teams place their entire 40-man roster on waivers, to try and disguise who they’re actually looking to pass through waivers.  Some teams are looking to place players with big contracts on waivers, just hoping that another team will be willing to assume the salary.  Just because a player is on waivers doesn’t necessarily mean the player is being shopped.  And just because a player is claimed, doesn’t mean he will be traded.

Blocking Deals

Sometimes you hear about teams blocking other teams from making moves.  For example, say the Cincinnati Reds are looking for a leadoff hitter.  The Pirates, with the higher priority, could claim every leadoff hitter that passes through waivers, essentially blocking Cincinnati from making any upgrades.  The risk taken here is that there’s no guarantee that the Pirates don’t get stuck with a ton of unwanted players.  The higher priority can serve as an advantage if two teams are looking to upgrade the same position.  For example, if Cincinnati and Pittsburgh are both looking for a leadoff hitter, the Pirates will have the priority as long as they are behind Cincinnati in the standings.

Trade Values

The value of trades goes down in August, mostly because teams don’t have much negotiating power.  They can only make a deal with one team, and they are limited with what they can receive in return, as they can only trade for players who reach them on waivers, or who aren’t on a 40-man roster.

Trade Examples

To give you a better idea of how the process works, here are a few examples of the various types of trades that can be made:

A Player on the 40-Man for a Player on the 40-Man

In any trade where teams are trying to swap two (or more) players on the 40-man roster, those teams have to make sure that the players reach their destination.  If the Pirates and the Marlins decide to make a swap of Player A and Player B, the Pirates have to hope that Player A passes through to Miami, while the Marlins have to hope that Player B passes through to the Pirates.  All it takes is for one player to get blocked to prevent a deal from happening.  Normally there is a gentleman’s agreement in place, although there can be some blocked deals.  That’s especially true if you have a situation like I mentioned above, where two division rivals have the same need.

Example: When the Pirates traded Brian Giles in 2003 to the San Diego Padres, they received Jason Bay and Oliver Perez, who were both on the 40-man roster for San Diego.  Getting Giles to the Padres wasn’t hard, as they had the number one waiver claim.  However, Bay and Perez had to pass through three other NL teams before they could go to the Pirates.

A Player on the 40-Man for Prospects

Once a team claims a player, they can try to trade as many prospects as needed to get the other team to release that player, provided the prospects aren’t on the 40-man roster.

Example: Pretty much 90% of the deals that go through.

So there you have it! The July 31st trade deadline has passed, but teams still have until August 31st to make a trade.  They can actually trade beyond August 31st, but only players acquired prior to September 1st can join the playoff roster, making September trades rare.

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Stephen Stasa

How does the claim process actually work? Is it public where each team has a period of time to claim a player before the next team has the option? Or are claims done in a way that nobody knows (nobody outside the MLB office, that is) who is being claimed until the window closes?

If it’s the time period, can a team who’s time has expired still go back and make the claim as long as nobody else (including the team on the clock) claims him?

If it’s the secrecy method, can a team claim a few people and cancel the claim if they no longer need that player? For example, if a team is looking for a lead off guy, they claim three people to fill that role. Player A is grabbed by a team with higher priority , the other two fall through (which is why you claim more than just him). Can that team then say we don’t need player C because we were able to get player B, then player C would continue to pass on down the line or all the way through? Or would the team be force to find a place for both players on their 40 man roster?

Man, there are so many details and permutation for the order of events that I can think of. Is there somewhere to read these rules, so I can just lookup the details without overloading questions/posts here (too late?)?

kelsey pegden

So since the players are effectively being waived by their team do they lose their 10 and 5 right to block a trade?

Ian Rothermund

Well that’s not convoluted at all. How long has this system been in place and what was it like before that?

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