diff --git a/app/models/scoring-calculator.ts b/app/models/scoring-calculator.ts
index f09e1af..380bbcc 100644
--- a/app/models/scoring-calculator.ts
+++ b/app/models/scoring-calculator.ts
@@ -1313,8 +1313,8 @@ export async function recalculateAffectedLeagues(
       : [];
     const usernameByClerkId = new Map(
       teamOwnerUsers
-        .filter((u) => u.username != null)
-        .map((u) => [u.clerkId, u.username!])
+        .map((u) => [u.clerkId, u.username ?? u.displayName])
+        .filter((entry): entry is [string, string] => entry[1] != null)
     );
 
     // Build teamId → ownerId map from standings data