CJ Mahaney is the senior pastor of Sovereign Grace Church of Louisville. He loves sport and runs a podcast with his son called Don't waste your sports podcast where they discuss what is happening in American sports, and also discusses sports issues from a biblical perspective. This sermon is a great place to start thinking about sport from a Christian point of view. He looks at more than just playing sport but also a sports spectator.
It is also possible to get your hands on a booklet of this sermon called Don't waste your sports.