Check out these youtubes of this year's Koshien highschool tournement, particularly this kid Yoshinori Sato

17 K, most on 80ish mph sliders, but then towards the LATER half the of the game he reached back and blew 97 mph fastballs by guys.. wtf why even bother with a slider?

And then in the 4th round, he hit 98 mph o_O

the kid didn't even win the tournement, the final came down to a super all elite team vs a public school team... and the public school won o_O down by 4 in 8th they got away with a strike out that turned into a bases loaded walk and followed by a HR for a truely crazy cool finish to the tournement.
finals highlights.