Lets be clear about this. The School brochure (published by Jehovah's Witnesses) says this:
Yet you may have noticed that most Witness youths do not participate in extracurricular activities sponsored by the schools.
Sports: Bodily training, such as we get in sports, is good for us. But placing the matter in proper perspective, the Bible says: "Be training yourself with godly devotion as your aim. For bodily training is beneficial for a little; but godly devotion is beneficial for all things." (1 Timothy 4:7, 8) In keeping with this advice, Jehovah's Witnesses appreciate the value of physical education courses that are conducted during school hours.
At the same time, however, Witness parents feel that schools often overemphasize sports. Therefore in training their children, they try to moderate the emphasis on athletic achievement. They hope their young ones will want to pursue careers, not as athletes, but as ministers of God. So Witness parents encourage their children to use after-school hours principally to pursue spiritual interests, rather than to excel in some sport.
Participation in organized sports, we believe, would expose Witness youths to unwholesome associations. We also feel that the competitive spirit in modern sports-'the winning isn't everything, it's the ONLY thing' ideology-has harmful effects. So if Witness youths feel the need for extra recreation, their parents encourage them to seek such recreation with fellow believers, yes, "along with those who call upon the Lord out of a clean heart."-2 Timothy 2:22. sj 1983 Page 22
There you have it. Witness kids take part in sports sponsored by fellow believers. Didn't anyone here play 11-man football in inter-congregation competition? Some parents and congregations take different views but the official line is clear.