Brad of "Moneyball" (4)
I believe the answer is:
pitt
'brad of moneyball' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pitt that I've seen before include "old politician" , "Brad --, US actor" , "William --, who became Prime Minister at 24" , "Old British statesman" , "William --, early PM" .)