Preserving a 6 – 5 win over the Cardinals, Trevor Hoffman becomes the third pitcher in major league history to save 400 games. The Padres reliever joins Lee Smith (478) and John Franco (424) as the other bullpen artists to have also reached this milestone.

On May 6, 2005 — Preserving a 6 – 5 win over the Cardinals, Trevor Hoffman becomes the third pitcher in major league history to save 400 games. The Padres reliever joins Lee Smith (478) and John Franco (424) as the other bullpen artists to have also reached this milestone.

Source:
Baseball Reference May 6