But there are also some 400 plaintiffs who never played a single down in a professional game, but participated in training camps or served time on a practice squad.
On one end of the gluten spectrum, for example, are some professional tennis players who never felt sick but when they drastically cut down on gluten found increased energy that enabled them to win long, tough matches that they had previously been losing.
Gatland says that if Henson never returns to professional rugby it would be a loss for the game but the New Zealander says he suspects that the Bridgend-born player may relaunch his career outside of Wales.
Clay has never been a favored surface for top American players in the professional era, but during the country's recent downturn, they've seemed positively allergic to the crushed brick.