我觉得是整句话是一句定语从句的从句部分.你这个句子成分不完整.
划分结构,你可以看的更清楚些.
who （as many of you know） is a member of this year's Olympic diving team
as many of you know是修饰who,就是“你们很多人知道的这个人”.
剩下的who is a member of this year's Olympic diving team就是我说的定语从句的从句部分,原文前面应该还有东西.