Crisis is a symptom of a sport torn between the commercial imperative to play more and the medical imperative to play less You might have missed it in all the excitement, but Sergio Parisse finally announced his retirement late last month. After 21 years, 470 professional games, 142 Test matches (94 of them as captain), 15 Six Nations championships and five World Cups, Parisse had decided to quit at the end of the season.