monday morning quarterback

The phrase "Monday morning quarterback" refers to a person who criticizes or offers opinions on a situation, particularly a sports game or event, after it has already happened and the outcome is already known. It implies that the person is able to analyze and make judgements on what should have been done differently when they have the benefit of hindsight, rather than actively participating or making decisions in the actual moment. The term, often used metaphorically, can also apply to situations beyond sports, where someone offers opinions or criticisms after the fact.