The sportsbooks are clearly favoring the fight going the distance and Crawford winning on points.
Fight outcome betting has Crawford at -120 to win by Decision or Technical Decision. As opposed to +150 for a win by TKO, KO, or DQ. Porter is +1100 to win by TKO, KO, or DQ, and he is +900 to win by Decision or Technical Decision.
As you can see, you have very good Vegas boxing odds on Porter to win in either of those betting markets.