Unique situation - as a short segment flier I hit 1k on segments and end up on US getting *A credit a fair amount. Had a LGA-PHL-PWM on US.
Incoming flight from LGA went delayed due to mechanical at lga and delay would've caused missed connection. US agent re-booked me on a delta direct flight.

Since mechanical would UA give me the original *A routing credit on the US flights for the 2 segments or will I get nothing since it was US and rebooked me outside of *A?