Complex sentence: He had total earnings of US $670,000 on the 2014 PGA Tour, sufficient earnings as a non-member to earn a PGA Tour card for the 2014--15 season.
Split into simpler sentences: He had total earnings of US $670,000 on the 2014 PGA Tour. He played well enough on the 2014 PGA Tour as a non-member to earn a PGA Tour card for the 2014--15 season.