Conversation so far:
What was something that happened in 1990?
Leonard won his first cap in a 'friendly' on 28 July 1990.
Were there other winds in 1990?
CANNOTANSWER.
What happened in 1991?
England won back-to-back Grand Slams in 1991.
Did Leonard play an important role in these wins?
Leonard, Brian Moore and Jeff Probyn was fearsome, and the England scrum was famously solid, with this trio able to more than hold their own against any.
Are there any other interesting aspects about this article?
Against Wales in 1992, Leonard suffered a neck injury.

Question: How bad was the injury?
Self-contained rewrite: How bad was the injury of Leonard?