Sports Siblings

So anyway, these three guys are sitting in a bar, and they strike up a conversation. Eventually, the topic of their families comes up, and as is often the case when guys are talking and drinking beer, the discussion becomes somewhat competitive.

The first guy says "You know, I got me 5 healthy, strong sons!!" and sticks his chest out proudly.
"That's enough for a basketball team!!!"

The second guy replies "Well, sir, that's fine, but I got me NINE strapping young men!!" and beams with pride.
"And THAT'S enough for a BASEBALL team!!"

The third guy chuckles. "You boys think you're something, don't you?
Well, that ain't nothin'. Ya see, I got me EIGHTEEN beautiful young daughters ..."

The other two, puzzled, look at each other, then back at the third.

"...and THAT'S enough for a GOLF COURSE!!!"