diff --git a/app/models/__tests__/process-match-result.test.ts b/app/models/__tests__/process-match-result.test.ts
index 3afc8fc..1112225 100644
--- a/app/models/__tests__/process-match-result.test.ts
+++ b/app/models/__tests__/process-match-result.test.ts
@@ -59,7 +59,7 @@ function makeDb(existingResult?: { id: string; isPartialScore: boolean }) {
   };
 }
 
-import { processMatchResult, isLoserNotifiable } from "../scoring-calculator";
+import { processMatchResult, isLoserNotifiable, processPlayoffEvent } from "../scoring-calculator";
 import { doesLoserAdvance } from "../playoff-match";
 import { updateProbabilitiesAfterResult } from "~/services/probability-updater";
 
@@ -398,3 +398,127 @@ describe("isLoserNotifiable", () => {
     ).toBe(true);
   });
 });
+
+describe("processPlayoffEvent - NBA Play-In Round 1 loserAdvances fix", () => {
+  function makePlayInDb(matches: object[]) {
+    const insertedRows: Array<{ participantId: string; finalPosition: number; isPartialScore: boolean }> = [];
+    const insertValues = vi.fn().mockImplementation((values: object) => {
+      insertedRows.push(values as typeof insertedRows[0]);
+      return Promise.resolve();
+    });
+
+    return {
+      db: {
+        insert: vi.fn().mockReturnValue({ values: insertValues }),
+        update: vi.fn().mockReturnValue({
+          set: vi.fn().mockReturnValue({ where: vi.fn().mockResolvedValue(undefined) }),
+        }),
+        delete: vi.fn().mockReturnValue({ where: vi.fn().mockResolvedValue(undefined) }),
+        query: {
+          scoringEvents: {
+            findFirst: vi.fn().mockResolvedValue({
+              id: "event-1",
+              playoffRound: "Play-In Round 1",
+              bracketTemplateId: "nba_20",
+              sportsSeasonId: "ss-1",
+              name: "NBA Playoffs",
+              sportsSeason: {
+                seasonSports: [{ seasonId: "season-1", season: {} }],
+              },
+            }),
+          },
+          playoffMatches: {
+            findMany: vi.fn().mockResolvedValue(matches),
+          },
+          participants: {
+            findMany: vi.fn().mockResolvedValue([]),
+          },
+          participantResults: {
+            findFirst: vi.fn().mockResolvedValue(undefined),
+          },
+          seasons: {
+            findFirst: vi.fn().mockResolvedValue({
+              id: "season-1",
+              pointsFor1st: 100, pointsFor2nd: 70, pointsFor3rd: 50,
+              pointsFor4th: 40, pointsFor5th: 25, pointsFor6th: 25,
+              pointsFor7th: 15, pointsFor8th: 15,
+            }),
+          },
+          seasonSports: { findMany: vi.fn().mockResolvedValue([]) },
+          sportsSeasons: { findFirst: vi.fn().mockResolvedValue(null) },
+        },
+      } as any,
+      insertedRows,
+    };
+  }
+
+  // All four Play-In Round 1 matches: East 7v8 (M1), East 9v10 (M2), West 7v8 (M3), West 9v10 (M4)
+  const PLAY_IN_MATCHES = [
+    {
+      id: "m1", round: "Play-In Round 1", matchNumber: 1, isScoring: false,
+      isComplete: true, scoringEventId: "event-1",
+      participant1Id: "winner-78e", participant2Id: "loser-78e",
+      winnerId: "winner-78e", loserId: "loser-78e",
+    },
+    {
+      id: "m2", round: "Play-In Round 1", matchNumber: 2, isScoring: false,
+      isComplete: true, scoringEventId: "event-1",
+      participant1Id: "winner-910e", participant2Id: "loser-910e",
+      winnerId: "winner-910e", loserId: "loser-910e",
+    },
+    {
+      id: "m3", round: "Play-In Round 1", matchNumber: 3, isScoring: false,
+      isComplete: true, scoringEventId: "event-1",
+      participant1Id: "winner-78w", participant2Id: "loser-78w",
+      winnerId: "winner-78w", loserId: "loser-78w",
+    },
+    {
+      id: "m4", round: "Play-In Round 1", matchNumber: 4, isScoring: false,
+      isComplete: true, scoringEventId: "event-1",
+      participant1Id: "winner-910w", participant2Id: "loser-910w",
+      winnerId: "winner-910w", loserId: "loser-910w",
+    },
+  ];
+
+  it("eliminates 9v10 losers (East & West) but NOT 7v8 losers", async () => {
+    const { db, insertedRows } = makePlayInDb(PLAY_IN_MATCHES);
+
+    await processPlayoffEvent("event-1", db, { skipRecalculate: true });
+
+    const eliminatedIds = insertedRows
+      .filter((r) => r.finalPosition === 0 && !r.isPartialScore)
+      .map((r) => r.participantId);
+
+    // 7v8 losers advance to Play-In Round 2 — must not be eliminated yet
+    expect(eliminatedIds).not.toContain("loser-78e");
+    expect(eliminatedIds).not.toContain("loser-78w");
+    // 9v10 losers are out immediately
+    expect(eliminatedIds).toContain("loser-910e");
+    expect(eliminatedIds).toContain("loser-910w");
+  });
+
+  it("eliminates ALL losers when bracketTemplateId is missing (falls back to safe default)", async () => {
+    // Guards against a future refactor that drops bracketTemplateId from the DB query.
+    // doesLoserAdvance receives "" → returns false for all matches → all losers eliminated.
+    const { db, insertedRows } = makePlayInDb(PLAY_IN_MATCHES);
+    (db.query.scoringEvents.findFirst as ReturnType<typeof vi.fn>).mockResolvedValueOnce({
+      id: "event-1",
+      playoffRound: "Play-In Round 1",
+      bracketTemplateId: null, // simulates missing templateId
+      sportsSeasonId: "ss-1",
+      name: "NBA Playoffs",
+      sportsSeason: {
+        seasonSports: [{ seasonId: "season-1", season: {} }],
+      },
+    });
+
+    await processPlayoffEvent("event-1", db, { skipRecalculate: true });
+
+    const eliminatedIds = insertedRows
+      .filter((r) => r.finalPosition === 0 && !r.isPartialScore)
+      .map((r) => r.participantId);
+
+    expect(eliminatedIds).toContain("loser-78e");
+    expect(eliminatedIds).toContain("loser-78w");
+  });
+});
diff --git a/app/models/scoring-calculator.ts b/app/models/scoring-calculator.ts
index 11d39d0..70c5b7d 100644
--- a/app/models/scoring-calculator.ts
+++ b/app/models/scoring-calculator.ts
@@ -6,6 +6,7 @@ import { getSeasonResults } from "./participant-season-result";
 import { updateProbabilitiesAfterResult } from "~/services/probability-updater";
 import { sendStandingsUpdateNotification, type ScoredMatch } from "~/services/discord";
 import { BRACKET_TEMPLATES } from "~/lib/bracket-templates";
+import { doesLoserAdvance } from "~/models/playoff-match";
 import { getUserDisplayName } from "~/models/user";
 import { createDailySnapshot } from "~/models/standings";
 import { logger } from "~/lib/logger";
@@ -251,7 +252,8 @@ export async function processPlayoffEvent(
     // receive floor points — R64 and R32 winners are not yet guaranteed top-8.
     const awardFloor = doesNonScoringRoundFeedIntoScoringRound(round, event.bracketTemplateId);
     for (const match of matches) {
-      if (match.loserId) {
+      const loserAdvances = doesLoserAdvance(round, match.matchNumber, event.bracketTemplateId ?? "");
+      if (match.loserId && !loserAdvances) {
         await upsertParticipantResult(match.loserId, event.sportsSeasonId, 0, db);
       }
       if (match.winnerId && awardFloor) {
@@ -1271,7 +1273,7 @@ export async function recalculateStandings(
 export async function recalculateAffectedLeagues(
   sportsSeasonId: string,
   providedDb?: ReturnType<typeof database>,
-  options?: { eventName?: string; eventId?: string; matchIds?: string[] }
+  options?: { eventName?: string; eventId?: string; matchIds?: string[]; skipDiscord?: boolean }
 ): Promise<void> {
   const db = providedDb || database();
 
@@ -1386,7 +1388,7 @@ export async function recalculateAffectedLeagues(
     });
 
     const webhookUrl = season?.league?.discordWebhookUrl;
-    if (!webhookUrl) continue;
+    if (!webhookUrl || options?.skipDiscord) continue;
 
     // Build clerkId → username map for all team owners in this season
     const ownerClerkIds = afterStandings
diff --git a/app/routes/admin.sports-seasons.$id.events.$eventId.bracket.server.ts b/app/routes/admin.sports-seasons.$id.events.$eventId.bracket.server.ts
index ab20924..763d614 100644
--- a/app/routes/admin.sports-seasons.$id.events.$eventId.bracket.server.ts
+++ b/app/routes/admin.sports-seasons.$id.events.$eventId.bracket.server.ts
@@ -614,11 +614,13 @@ export async function action({ request, params }: Route.ActionArgs) {
             sportsSeasonId: event.sportsSeasonId,
             bracketTemplateId: event.bracketTemplateId,
             skipSideEffects: true,
+            loserAdvances: doesLoserAdvance(match.round, match.matchNumber, event.bracketTemplateId ?? ""),
           }
         );
       }
 
-      await recalculateAffectedLeagues(event.sportsSeasonId);
+      // skipDiscord: recalculate-floors is a data-correction tool, not a result announcement.
+      await recalculateAffectedLeagues(event.sportsSeasonId, undefined, { skipDiscord: true });
 
       return { success: `Recalculated floors from ${sortedMatches.length} completed match(es)` };
     } catch (error) {