"If these facts [were] leaked to the press, my career would be done for," he said.

leaked 是动词 leak 的过去分词形式，leak 的意思是"泄露、透露"，通常指秘密或机密信息被不正当公开。在句中表示被动含义，即"被泄露"。 were 是 be 动词的过去式，在这里用于虚拟语气，表示假设的情况（这些事实实际上并未被泄露）。