Bought a lot ot chicken breasts (boneless, skinless).

I grilled them in a pan and thought they were done. Cooled them and
then but them in the refrig.

Today I went to cut them in cubes and noticed that some of them were
slightly pink on the inside - not raw, or even near raw.

I want to play safe. My intent was to freeze the cubes and then
defrost as needed.

Can I bake, broil, pan fry to make them safe? and then freeze them?

Thanks in advance