An engine assembly may include an engine structure, a rocker arm assembly supported by the engine structure, a camshaft rotatably supported on the engine structure and engaged with the rocker arm assembly, and a valve member engaged with the rocker arm assembly. The rocker arm assembly may include a lever body having a first end engaged with the valve member and a second end defining a pivot point and having an opening therethrough, an arm assembly including a first end rotatably coupled to the first end of the lever body and a second end including a latch, and a locking mechanism located within the opening in the lever body and including a latch pin having a recess therein and a guide holder including a finger extending into the recess preventing rotation of the latch pin relative to the guide holder.