Good luck getting Live sports... Sports Devil, Pro Sports, Castaway, etc all hit or miss. Only way is a paid premium add on. They can be costly or you can just buy one of my boxes and it comes with premium add ons free. Let me know if you need names of premium add ons for sports.
Most let you share as long as it's in the same network. Some let you share up to three connections. They all are password log in since paid subscriptions. You are looking at an average of 20 dollars a month per add on. They do allow you to watch on laptop, phone or tablets using their browser as well.
i use smoothstreams $10 a month works great but you cant use a vpn they don't allow it. I think they are taking new signups wth mystreams, its the same service as smoothstreams. Highly recommend it, you can use on your phone, tablet, pc etc..
Just buy the SAVAGE and you will be set. No more questions or looking for solutions to find a stream. Small invest for such big time gamblers. Box is amazing!!!!!!!!!!!!!!!!!!
You could try and use DofuSports it has a very nice variety of sports, however, if you are using a firestick with the regular remote you will need the best sports streaming sites. I hope this helps!