Mthembu, 28, would serve his sentence at the Qalakabusha Correctional Services facility in Empangeni after Lungelo Mzimela, 17, sustained severe and serious internal injuries to his lungs and liver leading to his death in December, according to Zululand Observer.
Mzimela had reportedly stolen alcohol from the SSS Tavern in Ngwelezane B Section and made his way to a neighbouring pub.
Mthembu was said to have followed and confronted Mzimela. They physically dragged him back to the tavern where he proceeded to assault the teenager.
The sentencing follows the release of a video showing a bouncer assaulting three men in a bathroom at nightclub venue Stones in Fourways, Johannesburg last year.
The video, filmed a month prior to being posted, shows the bouncer punching one of the three men without warning.
In October last year, five bouncers handed themselves over to Greenwood Park police following the death of 27-year-old Floyd Moody who died after an alleged assault outside the Empyre nightclub in Durban, according to media reports.
The bouncers had allegedly physically assaulted Moody and dragged his body to the centre median.
Moody had been rushed to the Addington Hospital, and was later transferred to the Inkosi Albert Luthuli Hospital, where he died.
It had been alleged that none of the bouncers were positively identified during an identity parade, and could not be linked to the case. Investigations were said to be on-going.
In 2012, Eugene Beneke, 19, reportedly suffered brain damage, a cracked skull and required surgery after being allegedly beaten up by a bouncer at the Barumba Club in Mountain View, Pretoria.