PGA Golf tournament In Atlantic City

The video covers a golf tournament featuring Snead, who is preparing for Navy induction, and Vanessa, an Army corporal. Snead plays a steady game, overcoming top pros to reach the final. The climax occurs at the 35th hole, where Snead secures victory with a 50-foot chip shot, winning the PGA title. This marks his first major victory in five years. The video concludes with reflections on the tournament and the players' achievements.

What does the term 'little Dark Horse' refer to in the text?

How long had it been since Snead's last major victory?