diff --git a/app/Models/ChampionRoles.php b/app/Models/ChampionRoles.php
index 7e8f8ec..a004338 100644
--- a/app/Models/ChampionRoles.php
+++ b/app/Models/ChampionRoles.php
@@ -21,6 +21,8 @@ class ChampionRoles extends Model
 
     public function getRolesAttribute($value)
     {
+        $value = is_array($value) ? $value : [$value];
+
         $mappedRoles = [];
         foreach ($value as $role) {
             switch ($role) {
diff --git a/database/seeders/ChampionRolesSeeder.php b/database/seeders/ChampionRolesSeeder.php
index 087e157..0653234 100644
--- a/database/seeders/ChampionRolesSeeder.php
+++ b/database/seeders/ChampionRolesSeeder.php
@@ -3,6 +3,10 @@
 namespace Database\Seeders;
 
 use Illuminate\Database\Seeder;
+use App\Models\ChampionRoles;
+use App\Models\Champion;
+use Illuminate\Support\Facades\Log;
+
 
 class ChampionRolesSeeder extends Seeder
 {
@@ -11,8 +15,47 @@ class ChampionRolesSeeder extends Seeder
      */
     public function run(): void
     {
-        // TODO: http://cdn.merakianalytics.com/riot/lol/resources/latest/en-US/championrates.json
         $roleDataUrl = 'http://cdn.merakianalytics.com/riot/lol/resources/latest/en-US/championrates.json';
         $roleData = json_decode(file_get_contents($roleDataUrl), true);
+
+        foreach ($roleData['data'] as $championId => $roles) {
+            $rolesExists = ChampionRoles::where('champion_id', $championId)->first();
+            $championExists = Champion::where('champion_id', $championId)->first();
+
+            if ($championExists) $championName = $championExists->name;
+
+            $playedRoles = [];
+
+            foreach ($roles as $role => $data) {
+                if ($data['playRate'] > 0) {
+                    $playedRoles[] = $role;
+                }
+            }
+
+            $rolesAttributes = [
+                'champion_id' => $championId,
+                'champion_name' => $championName,
+                'roles' => $playedRoles,
+            ];
+
+            if ($rolesExists && $this->hasAttributesChanged($rolesExists, $rolesAttributes)) {
+                Log::info('Roles for ' . $championName . ' have changed, updating...');
+                $rolesExists->update($rolesAttributes);
+            } elseif (!$rolesExists) {
+                Log::info('New roles detected for ' . $championName . '! Creating...');
+                ChampionRoles::create($rolesAttributes);
+            }
+        }
+    }
+
+    private function hasAttributesChanged($roleData, $attributes)
+    {
+        foreach ($attributes as $key => $value) {
+            if ($roleData->{$key} != $value) {
+                return true;
+            }
+        }
+
+        return false;
     }
 }
diff --git a/database/seeders/DatabaseSeeder.php b/database/seeders/DatabaseSeeder.php
index 148952d..b0d3d9a 100644
--- a/database/seeders/DatabaseSeeder.php
+++ b/database/seeders/DatabaseSeeder.php
@@ -16,6 +16,7 @@ class DatabaseSeeder extends Seeder
         $this->call(ChampionSeeder::class);
         $this->call(ChampionSkinSeeder::class);
         $this->call(SkinChromaSeeder::class);
+        $this->call(ChampionRolesSeeder::class);
 
         Log::info('Seeding complete at ' . date('Y-m-d H:i:s'));
     }