League?

[aKalisch]

Since realease of SC2 2.0.5 the league of your own and your opponent will be saved in the replay.

Is it possible to implement that to the parser?

[ascendedguard]

It should be possible, I've also seen "Swarm Level" and a lot of other player information in the headers.

I think a decision needs to be made though on either where to add these fields without making breaking changes for existing users, OR clean up the class format and release a breaking version (2.0) that adds the new fields available for HOTS.

[aKalisch]

Implement it to the players object right beside color, iswinner etc.
so you could easily extend your application to this type of info ;)

I think there's nothing that break the old classes from other user.

As I could see:
The ReplayInitData extends the Player Class when parsing the info of replay.initdata.

This could be easily extended I think

Would do it if i got that knowhow about parsing replays.