MLB's Top 20 Pitching Leaders

As promised, here's the active players who've managed to put themselves in the Top 20 pitching leaderboard of Major League Baseball's history.

ERA:
13. Mariano Rivera- 2.23

WHIP:
3. Mariano Rivera- 1.00
7. Trevor Hoffman- 1.06

Win %:
16. Roy Halladay- .663
18. Johan Santana- .658

Games:
9. Trevor Hoffman- 1035
17. Mariano Rivera- 978

Games Started:
16. Jamie Moyer- 628

Saves:
1. Trevor Hoffman- 601
2. Mariano Rivera- 559

Homeruns Allowed:
1. Jamie Moyer- 511
14. Tim Wakefield- 393

Hit Batters:
9. Tim Wakefield- 178

Strikeouts Per 9 IP:
2. Kerry Wood- 10.35
5. Trevor Hoffman- 9.36
7. Oliver Perez- 9.12
8. Jake Peavey- 8.93
10. Johan Santana- 8.85
11. Arthur Rhodes- 8.82
12. Scott Kazmir- 8.76
18. Josh Beckett- 8.51

It's clearly difficult to crack the Top 20 in the pitching departments. Aside from strikeouts per 9 innings, this will remain the case for decades to come. They just don't pitch enough anymore to rack up the win totals or yesteryear's pitchers. Also, looking at the strikeouts per 9 innings makes me laugh- Ollie Perez, Rhodes, Kazmir...ha!

Notes- Billy Wagner was disqualified due to retiring (not active). Jamie Moyer was included due to his statement of wishing to make a comeback following Tommy John surgery.