Tlou Segolela put Pirates in the lead in the 20th minute of the first half with a clinical effort from inside Cosmos area, before Takesure Chinyama misses a golden chance after being set up by winger Khethowakhe Masuku.
Cosmos levelled the scores in the second half, before Roger de Sa, who was on the bench for the match, brought on Benni McCarthy, Onyekachi Okonkwo and Mabena, who turned the game around.
Mabena hit home the winner after some great work from Segolela on the right flank.
Bucs line-up: Moeneeb Josephs, Patrick Phungwayo, Lucky Lekgwathi, Ayanda Gcaba, Happy Jele, Khethowakhe Masuku, Thandani Ntshumayelo, Andile Jali (Ndumosi Mabena), Lehlohonolo Masalelsa (Onyekachi Okonkwo), Tlou Segolela, Takesure Chinyama (Benni McCarthy)
Kaizer Chiefs reserves also collected maximum points with a 1-0 win over Bidvest Wits at Eldorado Park Stadium.
Itumeleng Moshobane got the goal for Amakhosi.
Brilliant Khuzwayo who was on top form, and saved a penalty from Wits’ Denver Mukamba in the second half, while Chiefs defender Alton Macheke was shown a red card in the 73rd minute.
Chiefs line-up: Brilliant Khuzwayo, Gomolemo Rapeane, Gabriel Nicanti, Andile Nqabeni, Shawn Malinga, Alton Macheke (dismissed 73rd), Itumeleng Moshobane (Solomon Khopotse), Sandile Mtshali, Philane Cele, Khotso Malope (Tsediso Letsholanyane), Sakhile Hlongwa (Nicholas Mynhardt).
Meanwhile, University of Pretoria earned a comprehensive 3-1 victory over Mamelodi Sundowns, who lost 3-0 to Moroka Swallows last week
The Birds were on the receiving of a 3-0 drubbing this week, from SuperSport United.
>>Team line-ups taken from club websites, where available
22 January 2013
GAUTENG MONDAY LEAGUE 2012/13
|1 Orlando Pirates||4||3||1||0||9||4||5||10|
|2 Jomo Cosmos||4||3||0||1||10||4||6||9|
|3 University of Pretoria||4||2||1||1||10||8||2||7|
|4 Kaizer Chiefs||4||2||1||1||7||6||1||7|
|5 SuperSport United||4||1||2||1||7||5||2||5|
|6 Moroka Swallows||4||1||1||2||7||8||-1||4|
|7 Mamelodi Sundowns||4||1||0||3||5||10||-5||3|
|8 Bidvest Wits||4||0||0||4||5||15||-10||0|