Bath moved into second place in the Aviva Premiership with a 39-16 derby victory away to Gloucester on Saturday.
Northampton edged out Leicester 23-19 at Franklin's Gardens as Saints skipper Dylan Hartley was sent off.
Saracens director of rugby Mark McCall was thrilled after watching his team run in 11 tries against London Welsh.
Northampton look set to appeal against Dylan Hartley's sending-off after Saints captain saw red again for elbowing.
Harlequins returned to winning ways in the Aviva Premiership thanks to a 15-7 victory over Newcastle Falcons.
Saracens ran in 11 tries to demolish London Welsh 78-7 at Allianz Park and return to the Premiership play-off spots.
Leicester rugby director Richard Cockerill has defended the Aviva Premiership salary cap.
Exeter have confirmed Tom James will head back to former club Cardiff Blues at the end of the season.
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