diff --git a/Scripts/canonicalize_games.py b/Scripts/canonicalize_games.py
index 771600d..5becb4e 100644
--- a/Scripts/canonicalize_games.py
+++ b/Scripts/canonicalize_games.py
@@ -97,6 +97,18 @@ TEAM_ABBREV_ALIASES = {
     ('NFL', 'TAM'): 'team_nfl_tb',    # Tampa Bay alternate
     ('NFL', 'SFO'): 'team_nfl_sf',    # San Francisco alternate
     ('NFL', 'WAS'): 'team_nfl_was',   # Washington (direct match but include for completeness)
+
+    # MLS
+    ('MLS', 'LA'): 'team_mls_lag',     # LA Galaxy
+    ('MLS', 'NYC'): 'team_mls_nycfc',  # NYC FC
+    ('MLS', 'RBNY'): 'team_mls_nyrb',  # NY Red Bulls
+    ('MLS', 'NYR'): 'team_mls_nyrb',   # NY Red Bulls alt
+    ('MLS', 'SJE'): 'team_mls_sj',     # San Jose Earthquakes
+    ('MLS', 'KC'): 'team_mls_skc',     # Sporting KC
+    ('MLS', 'DCU'): 'team_mls_dc',     # DC United
+    ('MLS', 'FCD'): 'team_mls_dal',    # FC Dallas
+    ('MLS', 'MON'): 'team_mls_mtl',    # Montreal
+    ('MLS', 'LAF'): 'team_mls_lafc',   # LAFC alt
 }
 
 
diff --git a/Scripts/canonicalize_stadiums.py b/Scripts/canonicalize_stadiums.py
index 9df61d7..a27e3bb 100644
--- a/Scripts/canonicalize_stadiums.py
+++ b/Scripts/canonicalize_stadiums.py
@@ -200,6 +200,39 @@ HISTORICAL_STADIUM_ALIASES = {
         {'alias_name': 'qwest field', 'valid_from': '2004-06-01', 'valid_until': '2011-05-31'},
         {'alias_name': 'seahawks stadium', 'valid_from': '2002-07-01', 'valid_until': '2004-05-31'},
     ],
+
+    # MLS
+    'stadium_mls_bmo_stadium': [
+        {'alias_name': 'banc of california stadium', 'valid_from': '2018-04-01', 'valid_until': '2023-06-01'},
+    ],
+    'stadium_mls_paypal_park': [
+        {'alias_name': 'earthquakes stadium', 'valid_from': '2015-03-01', 'valid_until': '2020-12-31'},
+        {'alias_name': 'avaya stadium', 'valid_from': '2015-03-01', 'valid_until': '2020-12-31'},
+    ],
+    'stadium_mls_shell_energy_stadium': [
+        {'alias_name': 'pnc stadium', 'valid_from': '2021-03-01', 'valid_until': '2023-03-01'},
+        {'alias_name': 'bbva stadium', 'valid_from': '2019-01-01', 'valid_until': '2021-02-28'},
+        {'alias_name': 'bbva compass stadium', 'valid_from': '2012-05-01', 'valid_until': '2018-12-31'},
+    ],
+    'stadium_mls_dignity_health_sports_park': [
+        {'alias_name': 'stubhub center', 'valid_from': '2013-06-01', 'valid_until': '2019-01-31'},
+        {'alias_name': 'home depot center', 'valid_from': '2003-06-01', 'valid_until': '2013-05-31'},
+    ],
+    'stadium_mls_interandco_stadium': [
+        {'alias_name': 'exploria stadium', 'valid_from': '2017-03-01', 'valid_until': '2023-07-01'},
+        {'alias_name': 'orlando city stadium', 'valid_from': '2017-03-01', 'valid_until': '2019-01-01'},
+    ],
+    'stadium_mls_chase_stadium': [
+        {'alias_name': 'drv pnk stadium', 'valid_from': '2020-07-01', 'valid_until': '2024-01-01'},
+        {'alias_name': 'inter miami cf stadium', 'valid_from': '2020-07-01', 'valid_until': '2020-09-01'},
+    ],
+    'stadium_mls_america_first_field': [
+        {'alias_name': 'rio tinto stadium', 'valid_from': '2008-10-01', 'valid_until': '2021-08-01'},
+    ],
+    'stadium_mls_lowercom_field': [
+        {'alias_name': 'lower.com field', 'valid_from': '2021-07-01'},  # Current name with period
+        {'alias_name': 'new crew stadium', 'valid_from': '2021-07-01', 'valid_until': '2021-07-01'},
+    ],
 }
 
 
diff --git a/Scripts/canonicalize_teams.py b/Scripts/canonicalize_teams.py
index 62c0e41..1a3676e 100644
--- a/Scripts/canonicalize_teams.py
+++ b/Scripts/canonicalize_teams.py
@@ -19,6 +19,7 @@ from typing import Optional
 
 # Import team mappings from scraper
 from scrape_schedules import NBA_TEAMS, MLB_TEAMS, NHL_TEAMS, NFL_TEAMS
+from mls import MLS_TEAMS
 
 
 # =============================================================================
@@ -216,6 +217,41 @@ NFL_DIVISIONS = {
     'SEA': ('nfl_nfc', 'nfl_nfc_west'),
 }
 
+MLS_DIVISIONS = {
+    # Eastern Conference (MLS uses conferences, not divisions)
+    'ATL': ('mls_eastern', None),
+    'CHI': ('mls_eastern', None),
+    'CIN': ('mls_eastern', None),
+    'CLB': ('mls_eastern', None),
+    'CLT': ('mls_eastern', None),
+    'DC': ('mls_eastern', None),
+    'MIA': ('mls_eastern', None),
+    'MTL': ('mls_eastern', None),
+    'NE': ('mls_eastern', None),
+    'NYCFC': ('mls_eastern', None),
+    'NYRB': ('mls_eastern', None),
+    'ORL': ('mls_eastern', None),
+    'PHI': ('mls_eastern', None),
+    'TOR': ('mls_eastern', None),
+    # Western Conference
+    'AUS': ('mls_western', None),
+    'COL': ('mls_western', None),
+    'DAL': ('mls_western', None),
+    'HOU': ('mls_western', None),
+    'LAFC': ('mls_western', None),
+    'LAG': ('mls_western', None),
+    'MIN': ('mls_western', None),
+    'NSH': ('mls_western', None),
+    'POR': ('mls_western', None),
+    'RSL': ('mls_western', None),
+    'SD': ('mls_western', None),
+    'SEA': ('mls_western', None),
+    'SJ': ('mls_western', None),
+    'SKC': ('mls_western', None),
+    'STL': ('mls_western', None),
+    'VAN': ('mls_western', None),
+}
+
 
 # =============================================================================
 # FUZZY MATCHING
@@ -374,6 +410,7 @@ def canonicalize_teams(
         'MLB': MLB_DIVISIONS,
         'NHL': NHL_DIVISIONS,
         'NFL': NFL_DIVISIONS,
+        'MLS': MLS_DIVISIONS,
     }.get(sport, {})
 
     for abbrev, info in team_mappings.items():
@@ -447,6 +484,7 @@ def canonicalize_all_teams(
         ('MLB', MLB_TEAMS),
         ('NHL', NHL_TEAMS),
         ('NFL', NFL_TEAMS),
+        ('MLS', MLS_TEAMS),
     ]
 
     for sport, team_map in sport_mappings: