If they're good enough, they're old enough and this Australian lad looks to have a big career in front of him.
Meet nine-year-old rugby league player Meaalofa Te'o, who blasts his way through rugby pitches like a young Jonah Lomu.
This amazing footage was uploaded to Facebook by Moroni Martin and shows Meaalofa in full flow.
His team's tactics must consist of: Plan A = Get the ball to Meaalofa, Plan B = Get the ball to Meaalofa, Plan C...and so on.
We look forward to the possibility of seeing him in an Australian rugby league shirt soon.