Two goals in the last half hour gave Otterbourne victory at QK Southampton in a midweek Hampshire Premier League top flight clash.
Tom Ashton (63) and Tom Sands (86) were on target.
Stockbridge, who resigned from the Wessex League midway through last season, lifted the curtain on their Hampshire League life in style.
Liam Wilkins gave them the lead against Winchester Castle in the very first minute, and the same player added a second on 39 minutes.
Jas Beavis completed the victory in the third minute of added time in the second half.