John Miles Ecker (born October 12, 1948) is a German-American former basketball player and coach. He played college basketball for the UCLA Bruins under Coach John Wooden, winning three straight national championships from 1969 through 1971. Ecker played and coached professionally in Germany, where he also became a naturalized citizen in 1977. He also taught at a high school in Germany.
Playing basketball at University High in West Los Angeles, Ecker was named to the All-Western League Second Team in 1965. As a senior, he averaged 20.7 points per game and was named to the All-Los Angeles City First Team. He was also named to the All-Western League First Team along with fellow senior teammate Bill Seibert.
Ecker was not a marquee player for UCLA. Over three championship seasons, he played in nearly every game, though his playing time was limited and typically came when the outcome of the game was already decided. The skinny, 6-foot-6-inch (1.98 m) reserve served as a backup at both forward and center. He is one of 14 players who won three National Collegiate Athletic Association (NCAA) titles at UCLA under Coach John Wooden.
Ecker entered UCLA as a walk-on without an athletic scholarship, and was a starter on the freshman team in 1966–67. He was joined in the lineup by Seibert, his former high school teammate. The following season, Ecker redshirted and did not play. He made the 15-man varsity squad for 1968–69, and served as the team's third-string center.