Three players were sent off in five minutes of mayhem as the Tigers bounced back from last week's defeat at Wasps to beat Bath 17-12 in the Aviva Premiership at Welford Road.
Bath duo Francois Louw and Matt Banahan and Leicester's Brett Deacon were all shown red cards for foul play between the 60th and 65th minutes.
The dismissals proved a turning point in the game because Bath, who had just lost Simon Taylor to the sin-bin, saw their 12-6 lead - gained through tries from Stephen Donald and Tom Biggs - eroded as the hosts scored 11 points in five minutes.
Adam Thompstone crossed for Leicester's try, with the rest of the Tigers' points coming from the boot of George Ford.
Exeter remain unbeaten at Sandy Park this season as they moved up to fifth place for at least 24 hours after a 30-23 victory over Wasps.
The scores were level at 20-20 at half-time, with both sides scoring two tries in the second quarter - the visitors' second coming from a blatant forward pass which questions why TMOs are not at every Premiership match.
Both sides battled and were battered after the break with the Chiefs scoring a converted try and a penalty, while Wasps secured a losing bonus point with a penalty from replacement Tommy Bell just before the final whistle.
London Welsh claimed a 15-9 victory over basement rivals London Irish at the Kassam Stadium.
However the game was ruined as a contest by the early dismissal of number eight Chris Hala'ufia which resulted in the visitors having to play 70 minutes with 14 men.
The match was a dreadful spectacle with neither side having any attacking invention to break down the opposition's defence and it was left to Gordon Ross to secure victory for Welsh with five penalty goals.
Tom Homer and Ian Humphreys kicked London Irish's points.
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