Yeah, supposedly Candace found him on the inter webs (Ritchie ought to be paying more attention; if Candace is off searching handsome young Spanish (Chile by way of Spain) singers on the internet!!!) for the Rainbow reunion/select shows. From there, he went to MSG, Vandeburg, etc.
Doogie was also "discovered" by Candace; he had sent in a tape to Blackmore and she heard it; he then did the "Strangers In Us All" record with Rainbow in '94 following the end of his second stint with Purple.
It's all Blackmore's fault.
. He discovered, more or less, Ian Gillan, Ronnie Dio, Graham Bonnet, Joe Lynn Turner, Doogie White, and Ronnie Romero, all of whom went on to work in some form or another with Iommi, Malmsteen, and/or Schenker.