Grades are more important than sports PERIOD. If playing sports is an incentive to get better grades that's wonderful. I have seen first hand the effect bad grades has had on a high school football player.
I say keep the grade requirements, they aren't even that strict!

 The whole purpose you go to school is to learn and be prepared for the future. You don't have too many chances to do that and you should make the most of the opportunity. Sports requires a disproportionally large amount of time and energy and if it interferes with all the other schoolwork then it should take a back seat.
If you are truly talented in sports, you will still be able to pursue it after school is over. Give all other subjects a chance--you never know where your future lies. Sports may be fun, but knowledge is more important to the rest of your life.

 I believe it is fair.

I am an athlete and am still able to do good in school (high honors since 6th grade).

Remember there is always a life after (insert sport name here).

 Grades help to judje people

 No doubt about this one, if you don't have time to study you don't have time to play.

 Yes i think it is important that school kids make decent grades to play sports. Sports take up a lot of time so kids need to have study time also, without wearing themselves out. But unfortunately some schools push sports over academics and other programs (music, art, drama etc)

 Yes because you can't depend on just the sports to get you through life. If you are not good enough to make a team where you can make money, then you will find yourself in a situation where you don't know how to make money because of your lack of knowledge.
Sports are a privilege and the grades are the requirements to earn that. If you can't keep your grades up, you don't deserve to play sports.

 My mother would never let me play sports if my GPA was under a 3.0. I graduated with a 3.4 and played tennis, soccer, and volleyball in high school. Sports are a privilege and should be taken away if you aren't making the grade. There's no reason that you should be failing school but still allowed to play sports. It's ridiculous!

 Grades should play an important part. If someone is not making the grades, they should still be allowed to participate in sports, but not be allowed to play in games or competitions. We have too many lunkheads out there that don't know a thing but excel at sports. It's unfair to the dedicated student.

 Of Course. Where I'm from sports not only keep people out of trouble but also their grades up because if you don't pass you don't play. I think very highly of that rule in school.

 Yes they should because the academic comes before the extracurricular activities. Any ays at most schools you only have to have a c or higher in each class or a 2.0. That isn't that hard to do.

 Yes, a lot of people in my school hate it and only go because of the sports and work extremely hared to be able to stay on the team. If you take that away then a lot of the ones who already hate school will hate it more and not bother learning anything.

 The point of school is to get and education and LEARN. Sports are a fun addition but they are not the main focus. Therefore, when the important part (grades) start slipping, it's only fair to retract the privilege of participating it sports until the grades go back up.

 Yes, it is. If schools allowed people to play sports without having to make grades, they would become way to competitive and not know or understand how to make a living as they grow up. Then, when they finally get to a point where they are looking at playing professional sports and not make the teams, how could they support themselves if they cant read, write, do math, then the rest of society is stuck paying their way in taxes as they will be in the system.