diff --git a/prisma/migrations/20260331214013_add_cascade_delete/migration.sql b/prisma/migrations/20260331214013_add_cascade_delete/migration.sql
new file mode 100644
index 0000000..c38ec99
--- /dev/null
+++ b/prisma/migrations/20260331214013_add_cascade_delete/migration.sql
@@ -0,0 +1,23 @@
+-- DropForeignKey
+ALTER TABLE "bracket_matchups" DROP CONSTRAINT "bracket_matchups_matchId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "elo_snapshots" DROP CONSTRAINT "elo_snapshots_matchId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "matches" DROP CONSTRAINT "matches_eventId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "partnership_games" DROP CONSTRAINT "partnership_games_matchId_fkey";
+
+-- AddForeignKey
+ALTER TABLE "bracket_matchups" ADD CONSTRAINT "bracket_matchups_matchId_fkey" FOREIGN KEY ("matchId") REFERENCES "matches"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "matches" ADD CONSTRAINT "matches_eventId_fkey" FOREIGN KEY ("eventId") REFERENCES "events"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "elo_snapshots" ADD CONSTRAINT "elo_snapshots_matchId_fkey" FOREIGN KEY ("matchId") REFERENCES "matches"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "partnership_games" ADD CONSTRAINT "partnership_games_matchId_fkey" FOREIGN KEY ("matchId") REFERENCES "matches"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index e223385..e9274de 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -148,7 +148,7 @@ model BracketMatchup {
   createdAt       DateTime        @default(now())
   updatedAt       DateTime        @updatedAt
   event           Event           @relation(fields: [eventId], references: [id])
-  match           Match?          @relation(fields: [matchId], references: [id])
+  match           Match?          @relation(fields: [matchId], references: [id], onDelete: Cascade)
   round           TournamentRound @relation(fields: [roundId], references: [id])
   team1           Team?           @relation("BracketTeam1", fields: [team1Id], references: [id])
   team2           Team?           @relation("BracketTeam2", fields: [team2Id], references: [id])
@@ -174,7 +174,7 @@ model Match {
   bracketMatchups  BracketMatchup[]
   eloSnapshots     EloSnapshot[]
   createdBy        User?             @relation("MatchCreator", fields: [createdById], references: [id])
-  event            Event?            @relation(fields: [eventId], references: [id])
+  event            Event?            @relation(fields: [eventId], references: [id], onDelete: Cascade)
   team1P1          Player            @relation("MatchPlayer1", fields: [team1P1Id], references: [id])
   team1P2          Player            @relation("MatchPlayer2", fields: [team1P2Id], references: [id])
   team2P1          Player            @relation("MatchPlayer3", fields: [team2P1Id], references: [id])
@@ -192,7 +192,7 @@ model EloSnapshot {
   ratingAfter  Int
   ratingChange Int
   createdAt    DateTime @default(now())
-  match        Match    @relation(fields: [matchId], references: [id])
+  match        Match    @relation(fields: [matchId], references: [id], onDelete: Cascade)
   player       Player   @relation(fields: [playerId], references: [id])
 
   @@map("elo_snapshots")
@@ -208,7 +208,7 @@ model PartnershipGame {
   player1EloChange Int?
   player2EloChange Int?
   createdAt        DateTime @default(now())
-  match            Match    @relation(fields: [matchId], references: [id])
+  match            Match    @relation(fields: [matchId], references: [id], onDelete: Cascade)
   player1          Player   @relation("PartnershipPlayer1", fields: [player1Id], references: [id])
   player2          Player   @relation("PartnershipPlayer2", fields: [player2Id], references: [id])