Any opinions on what may have caused this?

Found the #1 intake pushrod in this condition after a run. The rocker, adjuster and lifter all look okay, which surprised me. No indication as to what caused it. The mangled end is the rocker end. View attachment 1715804075View attachment 1715804076View attachment 1715804077View attachment 1715804080
What does the sweep pattern on the top of the valve stem look like?
How many passes on the engine?