It has widely been reported that Sundowns are keen to lure the 23-year-old defender to Chloorkop, along with Ajax Cape Town centre-back Rivaldo Coetzee and Bloemfontein Celtic striker Dumisani Zuma.
Kadodia has reason to believe that all these players' unorthodox behaviour has a common link, which is The Brazilians' interest in their services.
"I don't know exactly why Brian is delaying his stay in Kenya, speak to Mamelodi Sundowns – ask them why all the players they have targeted everywhere are not training [with their respective clubs]," Kadodia tells KickOff.com.
"It is not only Brian Onyango, but Rivaldo Coetzee at Ajax Cape Town as well as Dumisani Zuma at Celtic, and I don't know who else they are targeting.
"The player [Onyango] still has a contract but I'll deal with that at the right time. But as I'm saying to you now, whatever information you want [about Onyango] is to try and speak to Sundowns and ask what is the process and why all the players they are targeting are not at training with their clubs."
Sundowns spokesperson Thulani Thuswa has since responded to Kadodia's claims, distancing themselves from any dubious tactics while confirming that they have in fact rescinded their interest in the Kenyan international.
"The chairman should be talking about Maritzburg United players, and the other clubs should speak for their own players," Thuswa responds to this website.
"Similarly we are not responsible for Brian Onyango, only for Sundowns players to attend training sessions. Sundowns and Brian Onyango have not engaged.
"We've engaged with Maritzburg United because we know the right channels to follow. When we did so we quickly realised that our engagements were failing and we've since revoked our interest in Brian Onyango.
"I'm not sure why Brian Onyango is unsettled, but it has nothing to do with us."
It is believed Maritzburg want in the region of R8-million for the stocky centre-back, and have rejected a proposed swap deal with Kwanda Mngonyama.
By Robin-duke Madlala & Chad Klate