diff --git a/defenders/calcs_defense.py b/defenders/calcs_defense.py
index 727712a..042bfed 100644
--- a/defenders/calcs_defense.py
+++ b/defenders/calcs_defense.py
@@ -383,14 +383,26 @@ def arm_outfield(all_arms: list):
     if not all_arms:
         return 5
 
-    if max(all_arms) > 8:
-        return -6
-    elif max(all_arms) > 4:
-        return -5
-    elif max(all_arms) < -4:
-        return +5
+    # Thresholds adjusted for tz_runs_total scale (ranges ~-8 to +23)
+    # Note: These thresholds are for tz_runs_total, not bis_runs_outfield
+    if max(all_arms) > 18:
+        return -6  # Exceptionally rare (top ~2-3 players)
+    elif max(all_arms) > 14:
+        return -5  # Elite arms (~5-8 players)
+    elif max(all_arms) > 10:
+        return -4  # Very good arms
+    elif max(all_arms) > 6:
+        return -3  # Good arms
+    elif max(all_arms) > 2:
+        return -2  # Above average
+    elif max(all_arms) > -2:
+        return -1  # Average
+    elif max(all_arms) > -5:
+        return 0   # Below average
+    elif max(all_arms) > -8:
+        return 1   # Poor arm
     else:
-        return max(all_arms) * -1
+        return 2   # Very poor arm
 
 
 def arm_catcher(cs_pct: str, raa: int, season_pct: float) -> int: