The PIKE Surname DNA Project currently has 23 different groups or twigs which are genetically distinct PIKE family lines. Which one are you in*?
And if you know a male PIKE that hasn't had their Y-DNA tested, suggest they get tested as globally the number of genetically different (and therefore unrelated) Pike family lines found so far is at least 53.
PIKE Surname DNA Project
* I'm in "Group 6" a descendant of James Pike b. ~1620 Pike-422 somewhere in England.
Zebulon Pike of Pikes Peak fame is in "Group 1" and marked with a blue square.