diff --git a/src/core/StatsSchemas.ts b/src/core/StatsSchemas.ts
index c37607bd6..8543f4bab 100644
--- a/src/core/StatsSchemas.ts
+++ b/src/core/StatsSchemas.ts
@@ -94,6 +94,7 @@ export const OTHER_INDEX_LOST = 3; // Structures/warships destroyed/captured by
 export const OTHER_INDEX_UPGRADE = 4; // Structures upgraded
 
 export const BigIntStringSchema = z.preprocess((val) => {
+  if (val === null) return 0n;
   if (typeof val === "string" && /^-?\d+$/.test(val)) return BigInt(val);
   if (typeof val === "bigint") return val;
   return val;
diff --git a/tests/StatsSchema.test.ts b/tests/StatsSchema.test.ts
index 8b8f6b5dd..b513e9537 100644
--- a/tests/StatsSchema.test.ts
+++ b/tests/StatsSchema.test.ts
@@ -1,3 +1,4 @@
+import { PlayerStatsLeafSchema } from "../src/core/ApiSchemas";
 import { PlayerStatsSchema } from "../src/core/StatsSchemas";
 
 function testPlayerSchema(
@@ -45,4 +46,32 @@ describe("StatsSchema", () => {
     testPlayerSchema("{", false, true);
     testPlayerSchema("{}}", false, true);
   });
+
+  test("null array elements coerce to 0n (LEFT JOIN rows with no stats)", () => {
+    // Postgres SUM() over all-NULL rows returns NULL. These should parse as 0n.
+    testPlayerSchema(
+      '{"attacks":[null,null,null],"betrayals":null,"gold":[null,null,null,null,null,null]}',
+    );
+  });
+});
+
+describe("PlayerStatsLeafSchema", () => {
+  test("null stat values coerce to 0n", () => {
+    const result = PlayerStatsLeafSchema.safeParse({
+      wins: "0",
+      losses: "1",
+      total: "1",
+      stats: { attacks: [null, null, null], betrayals: null },
+    });
+    expect(result.success).toBe(true);
+  });
+
+  test("missing required field (wins) still fails — undefined is not coerced", () => {
+    const result = PlayerStatsLeafSchema.safeParse({
+      losses: "1",
+      total: "1",
+      stats: {},
+    });
+    expect(result.success).toBe(false);
+  });
 });