Plymouth Devils poor form continued as they lost 58-38 at Sheffield to stay bottom of the Premier League.
Ricky Wells top scored for Plymouth with 12+1 while Ben Barker came away with 11 points.
John Oliver, who was guesting for the injured Kyle Hughes, got nine points from seven rides.
But the Devils squad suffered a further blow when Lee Smart was forced to withdraw from the meeting with a shoulder injury after the opening race.
He is now a major doubt ahead of Friday's match with Ipswich at St Boniface Arena.
Plymouth are now a point off second-from-bottom Leicester with four matches in hand, but are 17 points away from third-from-bottom Newport.