For example when I look at Rugby at the moment before it refreshes
Expert Group
Balance 32 Coordination 64 Defence 160 Health 192 Speed 160 Stamina 128 Strength 64
You can see a really clear pattern. Those stats all add up to 800, with dividing each by 32 balance being 1, coordination 2, defence 5, health 6, speed 5, stamina 4 and strength 2. So with the minimum total for expert being 425 (I remembered wrong in my other comment) and the max being 900, the min stats for rugby are 17, 34, 85, 102, 85, 68, 34