I'm going by a process of elimination and guess that Kendra was the diver who quit the show.
Count me in as being one who thinks Louie dropped out to defer to whom he feels is a better diver. I say to him keep up the good work in his weightloss fight, and for having an overall more humble character in his abilities and toward his fellow contestants. It was however cool to see him dive.
Then again, they're all doing what I can't do - dive off a high dive that tall let alone a flip. I can't even dive head first - don't know how to.