Joining a League

Leagues in Batter’s Eye are linked to your ESPN fantasy baseball league. Once connected, the platform syncs your roster and provides personalized analysis.

Joining an Existing League

If someone in your league has already set it up:

They’ll send you an invite link (valid for 7 days, single-use)
Click the link while signed in to Batter’s Eye
You’ll be added to the league automatically

That’s it — you’ll immediately see the league in the dropdown in the top-right corner of the app. If the invite was created for a specific team, that team is claimed for you automatically on join (as long as it’s still unclaimed and you haven’t claimed another) — otherwise, claim your team in League → Admin → Teams.

Creating a League

If you’re the first person from your ESPN league:

Go to League in the navigation
Click Create League
Enter your ESPN League ID — you can find this in your ESPN fantasy league URL (it’s the number after leagueId=)
The platform will sync your league’s rosters automatically

Inviting League Members

After creating a league:

Go to League → Admin → Invites sub-tab
Optionally pick a team for the invite — a team-targeted invite auto-claims that team for whoever joins with it (the default is a generic all-teams invite)
Click Create Invite, then Copy Link and share it with your league mate

Each invite link is single-use. Create a new one for each person you want to invite.

Connecting Your ESPN Credentials

Some features (like roster sync) require ESPN credentials. See Connecting ESPN for details.

Adding Multiple Leagues

You can add as many ESPN leagues as you want. Just repeat the Create League steps above with a different ESPN League ID. Each league gets its own roster sync, ownership data, and analysis.

Switching Between Leagues

If you’re in multiple leagues, use the league dropdown in the top-right corner of the app to switch between them. Your selected league affects what you see on the My Team page, ownership badges on the Players page, and pickup recommendations.