The former Aston Villa man was unimpressed with the goalkeeper.
Villa lost 2-0 at Stamford Bridge and Guzan was at fault, along with Joleon Lescott, for one of the goals.
As such, Taylor admitted the Aston Villa shot stopper was poor and needed to do better. The defeat increases the pressure on the Midlands side, who remain in the Premier League's bottom three.
Frightening.......sorry Brad but that's poor.... http://t.co/hb2nvhFuNN— Ian Taylor (@IanTaylor7) October 17, 2015
Meanwhile, BBC pundit Garth Crooks was also critical of Guzan, as well as Aston Villa as a whole.
Indeed, he told the BBC: "Aston Villa have been very clumsy and careless and Guzan has done them no favours. Frankly, from a good first half hour it has all fallen apart."
So what does the defeat mean for Tim Sherwood's future?
After all the speculation surrounding the Villa boss's job, he came out and declared he will keep the Midlands side up '100 per cent.' He then duly proceeded to drop his side's best player to the bench in Jordan Amavi, while also persisting with Lescott as well as Ashley Westwood.
Picking up points at Stamford Bridge will never be easy but, next time out, Villa host Swansea City - and a result is an absolute must from that game.