Theoretically it would be great to have that information on every single high school and college prospect but that is impossible. This isn't the big leagues where we record every little stat, have ever play on video, and have a base line to judge performance. It is hard enough to find basic counting stats for HS kids much less wRC+. Here is ESPN's MLB Draft Scouting Scale: 80 - Hall of Fame Caliber Among the best ever. Should be getting out very, very sparingly. Miguel Cabrera's hitting; Giancarlo Stanton's power. 70 Perennial All-Star Well above-average ability in a particular area. Matt Harvey's fastball; Mike Trout's speed. 60 - All-Star Caliber Solidly above average. 55 - One Grade Above Average Overall production will consistently meet or exceed the league average for his position, or have a particular skill that is one tick above the league average. 50 - Solid-Average Player at the Major League Level For an overall grade, this represents a position player who will play every day in the majors, a starting pitcher in the third or fourth slots in a major league rotation, or an average middle reliever or setup man. For an individual attribute, this represents a league-average skill (a .270 batting average, a 90 mph fastball). 45 - Below-Average-Player Either a starter on a second-division club, or a bench player on an average or better club. Would include fourth outfielders, fifth/sixth starters, 11th/12th men on a pitching staff, etc. 40 - Future Potential Player An outside chance to get a "cup of coffee." Well below-average ability. 35 - Non-Prospects Will top out at, or likely before reaching, Double-A. 30 - Not a Pro Player A skill level just one tick above the worst possible grade. 20 - Lowest Player Grade Frank Thomas' running speed; Juan Pierre's power; Steve Blass' control. Here is how Kevin Goldstein defines hit tool: "Quite simply: the ability to routinely put the ball into play by making solid contact with the barrel of the bat on the middle of the ball. As you can note from the scouting report above, this is different from hitting for power, which is graded out as a different tool. This is more the ability to hit for a high batting average." He goes into more depth here on what factors scouts actually include in the hit tool: http://www.baseballprospectus.com/article.php?articleid=4860 Scouting grades are far from perfect but they don't have to be. They are just one aspect of scouting. Obviously they have value or why would every professional scout use them? For fun, here is an A's scout's scouting report on Joe Mauer: http://m.thewhistle.com/news/baseball/oaklands-scouting-report-joe-mauer-2003/830/