Biggar missed his first attempt but he was allowed to retake it, 10 metres closer to the posts, because Scarlets scrum half Martin Roberts put him off.
The Scarlets twice threatened the Ospreys line with concerted attacks, but five minutes from time Biggar landed his third penalty to take the visitors' tally to 21 points. Edwards' consolation try came from the final play of the game.
|Scarlets Score Card|
|Ospreys Score Card|