A few months ago we shared the projected batting and pitching leaders from The Bill James Handbook 2007 (Who are the projected batting and pitching leaders for 2007?) This time of year, people want to know who the high impact young guys are. Each year we update our projections from the Handbook based on offseason changes (available as a spreadsheet at The Bill James Handbook: Projections Update). Here are the updated batting and pitching leaders for players 25 or younger:
| Batting Average |
| American League | | National League | |
| 1. Joe Mauer | .331 | 1. Miguel Cabrera | .328 |
| 2. Robinson Cano | .325 | 2. Kevin Kouzmanoff | .321 |
| 3. Adam Lind | .316 | 3. Matt Murton | .316 |
| 4. Nick Markakis | .307 | David Wright | .316 |
| 5. Rocco Baldelli | .306 | 5. Brian McCann | .315 |
| Home Runs |
| American League | | National League | |
| 1. Grady Sizemore | 26 | 1. Miguel Cabrera | 32 |
| 2. Alex Gordon | 23 | 2. Jeff Francoeur | 31 |
| 3. Rocco Baldelli | 21 | 3. Prince Fielder | 30 |
| 4. Ian Kinsler | 20 | 4. David Wright | 29 |
| 5. 3 tied with | 19 | 5. Kevin Kouzmanoff | 27 |
| Runs Batted In |
| American League | | National League | |
| 1. Delmon Young | 89 | 1. Miguel Cabrera | 125 |
| Howie Kendrick | 89 | 2. David Wright | 112 |
| 3. Rocco Baldelli | 87 | 3. Jeff Francoeur | 111 |
| 4. Alex Gordon | 86 | 4. Ryan Zimmerman | 102 |
| 5. 2 tied with | 84 | 5. Kevin Kouzmanoff | 101 |
| Stolen Bases |
| American League | | National League | |
| 1. Carl Crawford | 55 | 1. Jose Reyes | 58 |
| 2. Delmon Young | 33 | 2. Hanley Ramirez | 46 |
| 3. B.J. Upton | 23 | 3. Willy Taveras | 32 |
| 4. Josh Barfield | 22 | 4. Chris Young | 24 |
| 5. 2 tied with | 20 | 5. Rickie Weeks | 23 |
| On-Base Plus Slugging (OPS) |
| American League | | | National League | |
| 1. Adam Lind | .936 | | 1. Miguel Cabrera | .986 |
| 2. Alex Gordon | .914 | | 2. Ryan Braun | .960 |
| 3. Joe Mauer | .899 | | 3. David Wright | .946 |
| 4. Grady Sizemore | .892 | | 4. Kevin Kouzmanoff | .932 |
| 5. Mark Teahen | .862 | | 5. Brian McCann | .928 |
| Wins |
| American League | | National League | |
| 1. Jered Weaver | 14 | 1. Matt Cain | 14 |
| 2. Felix Hernandez | 13 | Dontrelle Willis | 14 |
| 3. Jeremy Bonderman | 12 | 3. Chuck James | 13 |
| Justin Verlander | 12 | Zach Duke | 13 |
| Jeremy Sowers | 12 | 5. Scott Olsen | 12 |
| Saves |
| American League | | National League | |
| 1. Fran. Rodriguez | 44 | 1. Chad Cordero | 28 |
| Huston Street | 44 | 2. Jonathan Broxton | 11 |
| 3. Chris Ray | 35 | 3. Matt Capps | 5 |
| 4. Joel Zumaya | 8 | 4. Ambiorix Burgos | 4 |
| 5. Jesse Crain | 1 | 5. Many tied with | 0 |
| Strikeouts |
| American League | | National League | |
| 1. Felix Hernandez | 197 | 1. Matt Cain | 203 |
| 2. Jered Weaver | 188 | 2. Scott Olsen | 199 |
| 3. Jeremy Bonderman | 179 | 3. Dontrelle Willis | 170 |
| 4. Brandon McCarthy | 175 | 4. Ian Snell | 167 |
| 5. Scott Kazmir | 171 | 5. Chuck James | 164 |
| ERA |
| American League | | National League | |
| 1. Jered Weaver | 3.08 | 1. Matt Cain | 3.52 |
| 2. Rich Harden | 3.28 | 2. Chuck James | 3.53 |
| 3. Felix Hernandez | 3.47 | 3. Dontrelle Willis | 3.73 |
| 4. Jeremy Sowers | 3.58 | 4. Chad Billingsley | 3.83 |
| 5. Justin Verlander | 3.66 | 5. Anibal Sanchez | 3.86 |