[SWAVcast]

Originally Posted by LansdowneSt

What's the difference? A measure of power that doesn't manifest in the game, like the legend Ichiro could suddenly become a HR hitter if he chose to? The game creates skills based on stats so I'm not sure where the raw power comes from if it isn't in the game as power. But maybe I'm just not clear what you mean....

The 20-80 scouting grade scale breaks out power into 2 different categories.

“Raw” power is graded via a combination of visual evaluation during batting practice (How far can you hit the ball?) and the max exit velocities I source from teams. As I’ve sourced max exit velocities, I’ve found that there are a couple different ways teams keep track of this data. Several of them wipe away the top couple exit velos to eliminate the possibility of outliers. Keep this in mind as you look at the “Max Exit Velocities” on The Board. It’s a big part of why the visual evaluation piece is still very important in this space.

“Game” power is a grade describing power output. While raw power is “How far/hard can they hit the ball?”, game power is “What is their power production like in actual games?” These two are often different for any number of reasons (often augmented by swing plane, approach, or hit tool quality). The present game power grades are derived the same way present hit tool grades are. If a player’s approach and/or swing currently enable power in games, they’ll be a present 25 or 35 depending on their age. If they lack present strength, or have a contact-oriented approach, or need a swing change to get there, it’ll be a 20 or 30 depending on their age. Once again, I try to put a present grade on the game power in a traditional sense only once the player is in the upper levels of the minors.

https://blogs.fangraphs.com/how-to-u...rd-a-tutorial/