Dan Robson demanded more consistency from referees over close red card calls after 14-man Wasps fought back to keep their top-six hopes alive.
The England scrum-half claimed Ben Morris was unlucky to be dismissed for what referee Ian Tempest decided was a dangerous hit to the head on centre Ollie Lawrence 20 minutes from the end.
Hooker Tommy Taylor’s try five minutes later sealed the victory which puts Wasps eighth in the Premiership table with three games remaining.
Dan Robson (right) has called for consistency from referees following Ben Morris’ dismissal
Wasps overcame Worcester with 14 men to keep their hopes of finishing in the top six alive
They still have their sights set on a top six finish but scrum-half Robson said: ‘I’ve seen yellow and red cards given for virtually nothing. The frustrating thing for all the players is getting consistency.
‘Charlie Ewels’ one last night in Bath’s game with Sale was a very similar one and he gets a yellow but Ben gets a red for his. We are all watching it on the big screen and going ‘pick a number out the hat!’ All we want is consistency and if we get that it will be fine.’
Warriors had flanker Sam Lewis sent to the sin bin seven minutes from time for helping to collapse a scrum and the visitors endured another painful defeat.
Worcester flanker Sam Lewis (left) was sent to the sin bin late on to further add to their misery