Would u be able to play basketball if u had tetanus?

No: A person with tetanus would likely be hospitalized in an intensive care unit until his muscles were able to move properly again. A tetanus booster shot is recommended every 10 years. One such shot (Tdap) is given at age 11 years, so the next one should be given around age 21 years. The Tdap shot also protects against pertussis, which is the whooping cough, and against diphtheria, a rare infection.

Hard to speculate: First off tetanus is rare because most will get their primary immunizations as kids and a booster shot every 10 yrs is rather easy to do to avoid it. I recall stories of cases by elder docs when I trained, but it is rarely seen outside the 3rd world. Most who live through the disease are disabled due to nerve damage. Being able to walk would be a more likely goal than playing basketball.