Bucs got their job done by beating Polokwane City 3-0 at the Orlando Stadium.
However, that result wasn't effective because Sundowns beat Free State Stars 1-0 away from home.
The PSL champions, Sundowns ended up with 59 points compared to second-placed Pirates on 57 points.
The title race mirrored the final weeks of the English Premier League race between Liverpool and Manchester City in certain ways, and the excitement of South Africa's top flight race also captured the imagination of local fans.
We take a look at how the clubs and the media hailed Masandawana's achievement on Twitter on Saturday.
There were also a few legends and players who were early to congratulate Sundowns on social media.
🚨 BREAKING NEWS 🚨— robertmarawa (@robertmarawa) May 11, 2019
Free State Stars 0-1 Mamelodi Sundowns FT
Sundowns are crowned CHAMPIONS of the 2018/2019 PSL Season!!!
Free State Stars will play in the NFD next Season!!!
Maritzburg United into the playoffs!!
I think my only fear with regards to the Sundowns and Freestate match is if Sundowns win this match, the possibility of a pitch invasion is eminent 😳 putting lives in danger especially the kids who are there. I do hope there’s enough security.— Amanda toki Dlamini (@Amanda_Dlamini9) May 11, 2019
Let’s enjoy the last day of PSL
Mamelodi Sundowns are league champions "bottom and klaar" pic.twitter.com/iOurM31rYy— Marks Maponyane (@MarksMaponyane) May 11, 2019
Pitso Mosimane since being appointed #Sundowns manager in 2️⃣0️⃣1️⃣2️⃣:— Lorenz Köhler (@Lorenz07Kohler) May 11, 2019
His eighth title in seven years at @Masandawana . Legend. pic.twitter.com/jOg5f6srQH
Deputy Champions. You know the story hey...— Ernest Makhaya™ (@ernestmakhaya) May 11, 2019
BREAKING NEWS:— Smangaliso Mdluli (@SimangalisoMdl2) May 11, 2019
Mamelodi Sundowns are crowned champions of the 2018-19 PSL season.
Free State Stars relegated.
Chippa United survive relegation finishing position 12.
Kaizer Chiefs finish position 9 - No MTN8 football for them next season.
Maritzburg United into the playoffs.
Congratulations @Masandawana— James keene (@JamesKeene28) May 11, 2019
Congratulations to Mamelodi Sundowns for winning the Premier Soccer League title.— Bafana Bafana (@BafanaBafana) May 11, 2019
You deserved it and well done!