"Kaka is a gifted player who is perfectly suited to playing in the Premier League," said Richards on his website, MicahRichards.com.
"He is fast, skilful and strong, and he can score and create goals. In truth, I can't think of an attribute he doesn't have.
"A player of his ability will only thrive under the pressure - he certainly seems to be someone that always performs the bigger the occasion.
"He has been the main man for years at Milan so the pressure is something he is used to.
"The signing of Kaka would bring a lot to the club as he is one of the best players in the world. He would attract other big names here."