Brentford slumped to a seventh defeat in eight games as Shane Duffy gave 10-man Blackburn victory at Griffin Park.
Rovers claimed the points for a first away win in nine league games despite Grant Hanley’s red card after nearly an hour for a second bookable offence.
Substitute Tony Watt teed up Duffy who fired into the roof of the net with only four minutes remaining.
Defeat for the Bees was their 10th in 13 games, and leaves them just six points off the bottom three in 18th.
Hanley’s dismissal looked set to leave Blackburn still searching for an overdue win after he was booked for fouling Everton loanee Leandro Rodriguez in the first half and then shown a second yellow card deliberately handling an Alan Judge cross in the 57th minute.
Brentford – on manager Dean Smith’s birthday – failed to capitalise, though, as Alan McCormack sliced an effort wide and Yoann Barbet tested Jason Steele from a free-kick.
Judge saw an injury-time effort tipped wide by goalkeeper Steele after Duffy had broken the deadlock, before centre-back Harlee Dean headed wide in the closing seconds.
Rovers eased any fears of being dragged into the relegation dogfight as they moved up to 14th, three points above the Bees.