Lee's '08 Performance is Best in Modern Era...Seriously - Numbers Don't Lie:

Cliff Lee is 18-2 and his ERA is 2.43. He is pitching at a .900 clip. Beside that his team is 59-67, 8 games under .500. The Indians won 59 games so far, and Lee has won 18 , that is 30% of the overall wins. But thats been done before ...right? Not in the last ten years at least - in either league. I

In the AL over the last (10) years, the best Cy Young Winner's, record / winning percentage, is Clemen's 20-3 mark (.870) with the '01 Yankees. The next best is Pedro Martinez's 23-4 (.850) mark in '99 with the Red Sox, after that is Barry Zito at 23-5 (.820) for the '02 A's.

In the NL, the best Cy Young Winner's, Winning percentage, in the last 10 years is Randy Johnson in '02 for the Diamond Backs at 24-5 (.840), followed by Clemens in '04with the Astros at 18-4 mark (.820), and Carpenter at 21-5 (.810) when he was with St. Louis.

As far as their respective teams were in those years:
Roger Clemens' 2001 Yankees were 96-65 . Pedros Sox were 94-68 in 1999. Barry Zito's A's were 103-59 in '02. Johnson's '02 D Backs were 98-64, Clemen's Astros were 92-70in '04 and Carpenters Cardinals were 100-62 in 2005.

The Cleveland Indians are battling the Kansas City Royals for last place, seriously. I repeat, their record is 59-67.

The Cy Young Rankings per league are as follows below:

AL
1. Clemens - 20-3; 2001 - Yankees
2. Martinez - 23-4; 1999 Red Sox
3. Zito - 23-5; 2002 A's
4. Clemens - 20-6; 1998 Blue Jays
4. Santana - 20-6; 2004 Twins
6. Santana - 19-6; 2006 Twins
6. Haladay - 22-7; 2003 Blue Jays
8. Martinez - 18-6; 2000 Red Sox
9. Sabathia - 19-7; 2007 Indians
10. Colon - 21-8; 2005 Angels

NL
1. Johnson - 24-5; 2002 Diamond Backs
2. Clemens - 18-4; 2004 Astros
3. Carpenter - 21-5; 2005 Cardinals
4. Johnson - 21-6; 2001 Diamond Backs
5. Glavin - 20-6; 1998 Braves
6. Peavy - 19-6; 2007 Padres
7. Johnson - 19-7; 2000 Diamond Backs
8. Webb - 16-8; 2006 Diamond Backs
9. Johnson - 17-9; 1999 Diamond Backs
* In 2003 Eric Gagne won as a closer with a 2-3 record and 55 saves

Top (3) overall ERAs of the (19) starting Cy Young Award Winners is Pedro's 1.74 in 2000, his 2.07 in 1999, and Randy Johnsons in 2002. The Average ERA of these (19) starting Cy Young Award winners is 2.73.

Cliff Lee's ERA is 2.43. This dude is nastier than you thougt.