Why do people pronounce “Celtics” (as in Boston Celtics) with a soft s of some kind, so “seltiks” instead of “Keltiks”?

Question

Why do people pronounce “Celtics” (as in Boston Celtics) with a soft s of some kind, so “seltiks” instead of “Keltiks”?

In: 6706

Answer 1

One April fools day, NPR announced the Celtics were changing the pronunciation to the hard K. People got really upset and it was hilarious.