Jacolby Campbell can usually tell within the first few minutes of a call which coaches are working off a depth chart and which ones are working off something closer to a relationship. The four-star Abbeville wideout has fielded plenty of both over the past year—the pitch decks, the highlight reels cut to his own tape, and the promises about scheme fit and NIL upside. What's actually held his attention is simpler than any of that: proof, not promises. Saturday, Houston gets to make that case in person. Campbell will be on hand for the Cougars' Week 2 matchup with Southern, a visit the Houston…