Ragged Saints, who are under the interim charge of Eamon O'Carroll for the rest of the season after Paul Rowley's exit last week, have lost eight of their past 12 matches. The 10-time Super League winners remain in seventh place and are in real jeopardy of missing out on the play-offs for the first time. However, Vaughan showed his experience and class to get over and Williams scrambled to touch the ball down when Saints erred on a kick as York went 12 ahead. Welsby's super off-the-cuff score was the try of the match as they went the length of the field but his side could not avoid another damaging defeat. York, who had lost to bottom-of-the-table Huddersfield last week, face a trip to Leigh on Friday while St Helens will bid to try and inject life into their season against lowly Hull FC on Thursday.