With so many factors going into play in the past ten years, pitchers are pitching less, bullpens are blowing more, and careers are sorter. Based on the active leaders, and outside of Glavine (295 wins), and possibly Randy Johnson (283), I'm not sure we'll see a 300 game winner in the next 10 years.
<center><table border="0" cellpadding="4" cellspacing="3"><tbody><tr><td>Mike Mussina (38)</td><td align="right">241</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>David Wells* (44)</td><td align="right">232</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Jamie Moyer* (44)</td><td align="right">221</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Curt Schilling (40)</td><td align="right">212</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Kevin Brown (42)</td><td align="right">211</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Kenny Rogers* (42)</td><td align="right">207</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Pedro Martinez (35)</td><td align="right">206</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>John Smoltz (40)</td><td align="right">200</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Andy Pettitte* (35)</td><td align="right">189</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Al Leiter* (41)</td><td align="right">162</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Tim Wakefield (40)</td><td align="right">156</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Brad Radke (34)</td><td align="right">148</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Aaron Sele (37)</td><td align="right">146</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Bartolo Colon (34)</td><td align="right">145</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Scott Erickson (39)</td><td align="right">142</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Mike Hampton* (34)</td><td align="right">138</td><td align="right">L</td></tr></tbody></table></center>
<center><table border="0" cellpadding="4" cellspacing="3"><tbody><tr><td>Mike Mussina (38)</td><td align="right">241</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>David Wells* (44)</td><td align="right">232</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Jamie Moyer* (44)</td><td align="right">221</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Curt Schilling (40)</td><td align="right">212</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Kevin Brown (42)</td><td align="right">211</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Kenny Rogers* (42)</td><td align="right">207</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Pedro Martinez (35)</td><td align="right">206</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>John Smoltz (40)</td><td align="right">200</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Andy Pettitte* (35)</td><td align="right">189</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Al Leiter* (41)</td><td align="right">162</td><td align="right">L</td></tr> <tr><td align="right">
</td><td>Tim Wakefield (40)</td><td align="right">156</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Brad Radke (34)</td><td align="right">148</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Aaron Sele (37)</td><td align="right">146</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Bartolo Colon (34)</td><td align="right">145</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Scott Erickson (39)</td><td align="right">142</td><td align="right">R</td></tr> <tr><td align="right">
</td><td>Mike Hampton* (34)</td><td align="right">138</td><td align="right">L</td></tr></tbody></table></center>