These year-end reviews by Bryant Gumbel, in which he gathers his correspondents to revisit their, and the year’s, best sports stories, always are entertaining. Included this year: a look back at Bernard Goldberg’s interview with Mike Tyson, who suddenly stopped their conversation, about the death of Tyson’s child, with a quietly spoken but firm, “You have to go.” Goldberg calls it “one of the most chilling” moments of his career, but it captured, on camera, the unpredictable volatility and emotional intensity that is Mike Tyson, inside or outside the ring.