According to Ken Rosenthal of Fox Sports, top prospect George Springer rejected a seven-year, $23 million contract offer from the Astros back in September. It's unclear if there were any further negotiations after that.

The offer is unprecedented because Springer has yet to make his major league debut. The Rays signed Evan Longoria to a six-year, $17.5 million extension only after six big league games, the earliest a player has ever signed a long-term deal. Springer has only played 62 games at the Triple-A level.

A seven-year contract would have bought out Springer's three pre-arbitration years and all three arbitration years in addition to one free agent season. One agent told Rosenthal that Springer could potentially earn $30 million for his three arbitration years alone.