Roarke will spawn when you approach the bush at the given coordinates.
He is very fast. He will summon an add from the swim team.
Not everyone is good with coordinates so I’ll just add that it is next to the road called Mason’s Cresent (very close to some houses)
Hmmm, it appears this one is missing a minimap in the image. I’ll see about fixing that :)
Reference to this guy?
https://en.wikipedia.org/wiki/Mike_Roarke (He was a Coach)