Koonce finished up a nice ten-year career with 13 appearances for the Boston Red Sox, going 0-1 with a 5.57 earned run average over 21 innings pitched.
Originally up with the Chicago Cubs in 1962, he moved on to the New York Mets after 5 1/2 seasons in Chicago, pitching for 3 1/2 years in Queens before ending up in Boston.
Over those ten seasons he posted a career record of 47-49, with an earned run average of 3.78 and 504 strikeouts over 971 innings pitched.
Though he didn’t appear in the Post Season, he was a part of the “Miracle Mets” of 1969, appearing in 40 games for the eventual World Champions, going 6-3 with an E.R.A. of 4.99 and seven saves coming out of the bullpen.