Henderson was one of four young players the Reds traded to the Mets for Tom Seaver on June 15, 1977. Though he played in only 99 games that year, he led the last-place Mets with 65 RBI and lost by one vote to Andre Dawson in Rookie-of-the-Year balloting. His nine triples in 1978 tied a club record, and his .306 average in 1979 and .290 in 1980 led the Mets. Traded to the Cubs for Dave Kingman in 1981, he had one more solid season, hitting .294 with 32 doubles for the 1983 Mariners.
