 NBA, the Boston Celtics will pay Jason Tatum $314 million over five years, richest contract in NBA history. Annual average value, $62.8 million. The Celtics, who were purchased for $360 million 22 years ago, are going up for sale. They were valued by Forbes last October at $4.7 billion. That's your sports on the Fox News Rundown. Jared Max, Fox News.