In 1988, the Celtics lost in six games to the Detroit Pistons in the Eastern Conference Finals. Following the season, head coach K.C. Jones retired and was replaced by assistant Jimmy Rodgers. Boston's hopes for 1988–89 faded when Bird underwent a procedure to remove bone spurs in his feet early in the season, and the Celtics won just 42 games before a first-round playoff defeat to the Pistons. Bird returned in 1989–90 and led the Celtics to a 52–30 record. In the playoffs, the Celtics collapsed after winning the first two games in a best-of-five series against the New York Knicks, losing three straight games and the series. After the playoffs, Rodgers was fired and replaced by assistant coach and former Celtics player Chris Ford.