Cornell law professor Michael C. Dorf offers some thoughts on a comment by Golden State Warriors head coach Steve Kerr that moves by NBA stars like Kawhi Leonard and Anthony Davis are “bad for the league.” Dorf explains that while the concept—and legal acceptability—of efficient breach in contract law demonstrate that the law does not impose an obligation to carry out one’s end of a bargain, one could understand Kerr’s statement more accurately to mean that because the legal remedies for enforcing sports contracts are inadequate, the NBA and its fans must rely on the consciences of individual players to honor the obligation of good faith.