The Black Cats took an early lead when Ross Stewart converted a sixth-minute penalty following a foul on Leon Dajaku.
Sunderland were comfortable in possession for the rest of the first half before Elliot Embleton added a second when he was set up by Alex Pritchard.
The third goal came five minutes after half-time when Lynden Gooch’s cross deflected off Doncaster defender Ben Blythe for an own goal.
It’s a result which moves the Black Cats up to second in the table, though they have played more games than teams behind them.
Our chief SAFC writer Phil Smith has delivered his verdict on how each Sunderland player fared at the Eco-Power Stadium:
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. Thorben Hoffmann - 7
Rarely troubled but made a couple of smart stops through the latter stages of the second half. 7 Photo: JPI Media
5. Lynden Gooch - 7
Always provided a good option in possession through the first half, and was excellent in the second, producing a good run and low cross for the third goal. Has his confidence back. 7 Photo: JPI Media
6. Corry Evans - 7
A really assured return to the starting XI. Swept up well in rare moments of danger, and moved it quickly and precisely in possession. Sunderland’s dominant position meant they could protect him with a substitution on the hour mark. 7 Photo: JPI Media
7. Dan Neil - 9
Constantly caused Doncaster issues with his composure, ability to turn away from tight spaces and play ambitious switches. Home side simply didn’t get near him. 9 Photo: JPI Media
8. Leon Dajaku - 7
Won one penalty and could have at least one more. Not always on the save wavelength as those around him but good fun to watch and increasingly impactful. 7 Photo: JPI Media