The Don was only ever dropped once - by any side, in his whole career. It came after his underwhelming Test debut, in Brisbane in 1928-29, in which he scored 18 and 1 and Australia lost by the little matter of 675 runs. Bradman was made 12th man for the second Test, in Sydney - I've seen a photograph of him carrying the drinks. He was recalled for the third Test in Melbourne, scored 79 and 112... and the only people to drop him after that were agonised fielders.
-espncricinfo