You’re right about how First Inning and Fangraphs calculate K%. First Inning does K/PA, Fangraphs does K/AB. Off the top of my head, K/PA seems to be the better measure.

As for Austin’s power development, eyewitness reports suggest that he’s still got room to mature physically. Another good indicator, perhaps, is that his GB% is steadily declining if you look month-by-month (although I’d still like to see a corresponding rise in his LD%). The ScoutingTheSally article suggested that outfielders have started playing him shallow, so it’s possible that he’s trying to loft the ball now over their heads now as an adjustment.

PG Crosschecker said it was possible that he was the fastest player in the 2008 draft. He ran the 60-yard dash in 6.20 seconds at a showcase. For comparison purposes, the current stolen bases leader in baseball is Carl Crawford, who reportedly ran a 6.4. Bo Jackson is supposed to have run the fastest 60-yd dash at a showcase and he did it in 6.1.

He also did a bit of pitching in HS, hitting 90 on the radar gun.

And despite having a statistically poor first year, BA ranked him as the 12th best prospect in the Appalachian League at the end of last season. Here’s what they said:

Though he struggled to make contact in his debut, Austin hit hard line drives when he did connect. The Astros’ second-round pick in June, he maintained his composure and gave a consistent effort in the field and on the bases, regardless of his fortunes at the plate. Austin has a chance to be a good hitter if he can learn to shorten his swing and use the opposite field. He also would benefit from improving his bunting ability so he could take advantage of his speed. His power potential is fringy, but he’s an above-average runner with the instincts to make him a prolific and efficient basestealer. A premium quick-twitch athlete, Austin is a plus defender in center field and has average arm strength.