Gordon discussion at beginning, lasts until 21st minute. Cain discussion begins after that.
If you listen to Petro, you'll notice that on one hand, he recognizes Gordon's BABIP as a regression candidate, but on the other hand, he describes Gordon as a "pretty good player" at the top of the lineup. He thinks Gordon could be a nice player to get on base and hit for gap power, then get driven in by good hitters.
I may be interpreting this wrong, or Petro may have used terrible wording. You decide.