The American’s tenure of just 11 games is one of the lowest ever for a fully appointed Premier League boss but Swansea’s American owners Steve Kaplan and Jason Levien had to act after the 4-1 home defeat to West Ham on Boxing Day.
“We are sorry to lose Bob after such a short period of time,” chairman Huw Jenkins said.
“Unfortunately things haven’t worked out as planned and we felt we had to make the change with half the Premier League season remaining.”
Bradley was appointed in October ahead of Ryan Giggs following the sacking of Francesco Guidolin but he was unable to make an impact on South Wales, with the team collecting just eight points from a possible 33.
But with supporters turning against Bradley on Monday, and with a home game against Bournemouth looming on Saturday ahead of next Tuesday’s trip to fellow strugglers Crystal Palace, Kaplan, Levien and Jenkins made the change.
Swansea are firmly in the relegation zone in 19th place with 12 points from 18 games, above bottom-side Hull only on goal difference and four points from safety.
Coaches Alan Curtis and Paul Williams will take charge of the team against Bournemouth at the weekend, with the club determined to make a swift permanent appointment.
Former Manchester United assistant manager Giggs, overlooked just three months ago, is a contender for the job, with other more experienced candidates also being considered.
with Crystal Palace acting swiftly and hiring Big Sam last week, the clock was ticking on Bradley’s tenure in Wales. he was never able to sort out the club’s defensive frailties, as Swansea conceded 29 goals in Bradley’s reign and at least three in eight of his 11 games.
“With the club going through such a tough time, we have to try and find the answers to get ourselves out of trouble,” Jenkins said. “Personally, I have nothing but praise for Bob.
“He is a good man; a good person who gave everything to the job. His work-rate is phenomenal and we wish him well for the future.”