Simplify the following text for a Grade 11 native English-speaking person.
Original: Throughout his entire NHL career , Thompson accrued 81 shutouts , which is sixth all-time in NHL history , and was second to only George Hainsworth ( who had 94 ) when Thompson retired .
Simplified: Throughout his entire NHL career career , Thompson made 81 shutouts , which is sixth all-time in NHL history , which was second to only George Hainsworth ( who had 94 ) when Thompson stopped playing .