diff --git a/cfbd/models/coach.py b/cfbd/models/coach.py
index 7e647331..43d9f91d 100644
--- a/cfbd/models/coach.py
+++ b/cfbd/models/coach.py
@@ -29,7 +29,7 @@ class Coach(BaseModel):
     """
     first_name: StrictStr = Field(default=..., alias="firstName")
     last_name: StrictStr = Field(default=..., alias="lastName")
-    hire_date: Optional[datetime] = Field(default=..., alias="hireDate")
+    hire_date: Optional[str] = Field(default=None, alias="hireDate")
     seasons: conlist(CoachSeason) = Field(...)
     __properties = ["firstName", "lastName", "hireDate", "seasons"]
 
diff --git a/cfbd/models/player_usage.py b/cfbd/models/player_usage.py
index 0afaa3a8..c304bad1 100644
--- a/cfbd/models/player_usage.py
+++ b/cfbd/models/player_usage.py
@@ -20,7 +20,7 @@
 
 
 
-from pydantic import BaseModel, Field, StrictInt, StrictStr
+from pydantic import BaseModel, Field, StrictInt, StrictStr, validator
 from cfbd.models.player_usage_usage import PlayerUsageUsage
 
 class PlayerUsage(BaseModel):
@@ -41,6 +41,16 @@ class Config:
         allow_population_by_field_name = True
         validate_assignment = True
 
+
+    @validator('*', pre=True)
+    def convert_string_to_float(cls, v):
+        if isinstance(v, str):
+            try:
+                return float(v)
+            except ValueError:
+                raise ValueError(f"Cannot convert {v} to float")
+        return v
+
     def to_str(self) -> str:
         """Returns the string representation of the model using alias"""
         return pprint.pformat(self.dict(by_alias=True))