The Redlegs trailed by two goals at half-time and fell even further behind in the third quarter, before settling in late to take a four-point win.
The Shepparton premiership player put together another quality game for Norwood, racking up 20 disposals, eight marks and five tackles to help his side to victory.
Rokahr has played all seven games for the Redlegs, averaging 19.6 disposals a game with 92 per cent disposal efficiency.
Elsewhere in the SANFL, Moama's Aidyn Johnson was in fine form despite his Sturt side falling to North Adelaide.
Johnson had 21 disposals, three tackles and two inside 50s, but it was the Roosters who showed strength late to take a 19-point win.
Johnson was joined in the Sturt line-up by Deniliquin's Jack Henderson, who had 14 disposals, three tackles and three inside 50s.
Henderson was set to play the VFL season with Werribee before it was cancelled.
● Shepparton's Orien Kerr continued to impress in the QAFL as his Mt Gravatt side knocked off Labrador.
Kerr was named in the best for a second straight week, having now played four games for the Vultures after making the move up north when the VFL was called off.
● The Ashley-Cooper family also maintained exceptional form in the AFL Canberra league.
Eloise Ashley-Cooper was among Queanbeyan's best player as the side took a 25-point win against Belconnen in the senior women's competition.
And Ben Ashley-Cooper was also strong in the Rising Stars competition, best-on-ground in his side's 27-point win against Belconnen.
Eloise and Ben have been named in the best in all three of their matches.
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