[Raymond]

I've had supervisors who say they don't like that statement.

They prefer "that play was right in front of my partner" or "I didn't get a good look".

They feel that saying "it was my partner's call" is the equivalent of saying "it's not my call/area" and means you saw something obvious but decided not to blow your whistle. (of course this applies to no-calls, there are no discussions if my partner actually makes a call).