Jeep, I think you misunderstood my question about my last pick of "N". I asked if I could go back and replace my "N" player pick with a "N" park pick at this time. Not a big deal if the answer is no.
Great! I wasn't thrilled with my "N" or "O" options so I'll spend an "N" pick on a stadium instead of a player which will give me the option of skipping that letter in the future.