Kindly refer to the following link(s):
Career in football - Assim al Hakeem (website)
What is the Ruling of Watching Football Games In Islam ? (website)
Sports as a profession in Islam
Is it permissible to watch football and support our favorite team?
Support Kafir Team over a Muslim One?
Is it permissible to support disbelievers in their sports? Is this kufr?
Watch Cricket? | Sheikh Assim Al Hakeem
Watching Cricket or Football - What if their Awrah is exposed?
Playing sports with friends who wear shorts & expose awrah, if I don't look at them?
Can I keep clothes, badges etc that have cross on them?