diff --git a/packages/contracts-bedrock/src/L1/OPStackManager.sol b/packages/contracts-bedrock/src/L1/OPStackManager.sol
index c6f868e7e0836..6f0ab58fe71af 100644
--- a/packages/contracts-bedrock/src/L1/OPStackManager.sol
+++ b/packages/contracts-bedrock/src/L1/OPStackManager.sol
@@ -185,34 +185,18 @@ contract OPStackManager is ISemver, Initializable {
     }
 
     function initialize(InitializerInputs memory _initializerInputs) public initializer {
-        initializePart1(_initializerInputs.blueprints);
-        initializePart2(_initializerInputs.release, _initializerInputs.isLatest, _initializerInputs.setters);
-    }
-
-    // Step 1: Initialize blueprint contracts
-    function initializePart1(Blueprints memory _blueprints) internal {
-        assertValidContractAddress(_blueprints.addressManager);
-        assertValidContractAddress(_blueprints.proxy);
-        assertValidContractAddress(_blueprints.proxyAdmin);
-        assertValidContractAddress(_blueprints.l1ChugSplashProxy);
-        assertValidContractAddress(_blueprints.resolvedDelegateProxy);
-        blueprint = _blueprints;
-    }
+        if (_initializerInputs.isLatest) latestRelease = _initializerInputs.release;
 
-    // Step 2: Initialize implementations for a release version
-    function initializePart2(string memory _release, bool _isLatest, ImplementationSetter[] memory _setters) internal {
-        if (_isLatest) {
-            latestRelease = _release;
-        }
-
-        for (uint256 i = 0; i < _setters.length; i++) {
-            ImplementationSetter memory setter = _setters[i];
-            Implementation storage impl = implementations[_release][setter.name];
+        for (uint256 i = 0; i < _initializerInputs.setters.length; i++) {
+            ImplementationSetter memory setter = _initializerInputs.setters[i];
+            Implementation storage impl = implementations[_initializerInputs.release][setter.name];
             if (impl.logic != address(0)) revert AlreadyReleased();
 
             impl.initializer = setter.info.initializer;
             impl.logic = setter.info.logic;
         }
+
+        blueprint = _initializerInputs.blueprints;
     }
 
     function setRelease(SetRelease memory _setRelease) external {