Pray for him.
Forbid it that pastors become callous and unmoved themselves! The desire is for growth in the gospel. Therefore, pray (Colossians 1:9-14; 2 Peter 3:18).
Minimize his influence.
Pastors should always be careful about who is appointed unto leadership. In this case, it would obviously make sense not to just put the Bible trivia champ in charge of teaching and leadership items. This is because the Bible trivia champ could also be a spiritual MMA champ on the side.
Watch him and the sheep.
If this guy is a Christian, then he must be cared for too. The pastor must do this while guarding and caring for the flock. This is the type of thing that keeps pastors up at night (see #4 above).
Lovingly aim to teach him.
Keep on keeping on (Titus 2:15).
Confront where necessary.
When there is sin involved, Jesus is clear (Matthew 18:15-18).
This type of thing weighs heavy upon pastors and church members alike. Therefore, even the consideration of such things should cause us to pause, evaluate our own hearts, and pray for receptivity of the word of Christ (James 1:20ff; Colossians 3:15).
