Use this site either as a team manager to administer player invites, or as a player to review and accept an invitation. Once a player has accepted an invitation to a team, they are locked to that team, meaning they cannot be removed.

You can also look up the current roster status of a team or see the latest notable accepted invitations
When does registration open? Updated!
Registration opens again on March 7th.
When will rosters be locked? Updated!
Rosters will be locked on March 27th 2016 12:00AM PDT, and will remain locked until after The International.
I registered my team for last season. Do I need to register it again?
Yes, everyone needs to do the registration again. Each trade window sets a clean slate and all teams need to confirm their players again. That way players can opt to lock to different teams and teams can opt to lock new players.
How does a player become locked to a team?
First, the administrator of a team issues either Primary Member invites or Substitute invites to players. Then these players can review their invites and choose to accept one of them. Once they’ve done so, the player is a confirmed member of the Pro Team and is locked until prior to the next trade period.
What does being locked to a team mean?
While a player is locked to a team, the team cannot kick the player, and the player cannot leave the team.
Can a Pro Team invite be rescinded?
Yes, but only if the player has not accepted it yet. Once a player accepts an invitation, the player cannot be removed from the team.
Can a player be invited to more than one Pro Team?
Yes, but they may only accept one of those invites.
What’s the difference between a Primary and Substitute invite?
Players who are in Primary slots are the ones who receive invites to the Major.
So how are Substitutes used then? Can they become Primary members?
Yes – in order to swap Primary and Substitute slots, both the Primary and Substitute players must agree to the swap.
What if we need to make roster changes after the lock?
Making changes to your roster will cause your team to no longer be eligible to receive a direct invitation to either the Major or the Regional Qualifiers. Note that this only applies to roster changes outside of your Primary and Substitute members -- there is no penalty for swapping between Primary and Substitute slots. Your team may still register and participate in the Open Qualifiers.
What if we need to change sponsors or join a team organization?
We have no restrictions on what organization or sponsor the team is part of, that is up to the arrangement between the players and the organization. The roster lock date only imposes the requirement that the registered set of players remain together.
What happens to pending invites after the lock date?
At that time, all pending invites will be canceled.
Do we need to update our in-client teams before the deadline as well?
No, we will use the registration list for information on who's on the team.
What information is publicly visible?
Invites are private, and can only be seen by the inviter and invitee. Once a player has locked to a team, that lock is made public.
Can Teams going through Open Qualifiers have substitutes?
Teams participating in the Open Qualifiers will be able to register up to 2 subs when they sign up for the tournament. They will still only be able to use the main 5 players during Open and eventually Regional Qualifiers, but they can have the subs available if needed for the Main event.