Instead of using some complicated formula to review May statistics, here is a breakdown of the numbers for the month sorted by category, for pitchers.

# PLAYER TEAM IP
1 Roy Halladay TOR 46
1 Zack Greinke KAN 46
3 CC Sabathia NYY 45.2
4 Carl Pavano CLE 45
5 Jered Weaver LAA 43
5 Johnny Cueto CIN 43
7 Adam Wainwright STL 42.2
8 Jason Marquis COL 42.1
8 Mark Buehrle CHW 42.1
8 Jake Peavy SDG 42.1
8 Edwin Jackson DET 42.1
8 Zach Duke PIT 42.1
13 Cliff Lee CLE 42
14 Justin Verlander DET 41.1
15 Derek Lowe ATL 40.2
15 Ted Lilly CHC 40.2
15 Matt Garza TAM 40.2
15 Ubaldo Jimenez COL 40.2
19 Barry Zito SFO 40.1
19 Matt Cain SFO 40.1

# PLAYER TEAM SO
1 Justin Verlander DET 56
2 Jake Peavy SDG 52
3 Javier Vazquez ATL 44
3 Zack Greinke KAN 44
5 Johan Santana NYM 42
5 Chad Billingsley LAD 42
7 Jon Lester BOS 41
7 Tim Lincecum SFO 41
9 Aaron Harang CIN 40
10 J. Zimmermann WAS 39
11 CC Sabathia NYY 37
11 Jorge De La Rosa COL 37
11 Max Scherzer ARI 37
14 Roy Halladay TOR 36
14 Ted Lilly CHC 36
14 Edwin Jackson DET 36
14 Felix Hernandez SEA 36
17 Dan Haren ARI 35
17 Cole Hamels PHI 35
17 Wandy Rodriguez HOU 35
17 James Shields TAM 35

# PLAYER TEAM Wins
1 Carl Pavano CLE 5
1 Justin Verlander DET 5
1 Rick Porcello DET 5
1 Tim Wakefield BOS 5
5 Derek Lowe ATL 4
5 Roy Halladay TOR 4
5 Ted Lilly CHC 4
5 Johan Santana NYM 4
5 Jason Marquis COL 4
5 Bronson Arroyo CIN 4
5 CC Sabathia NYY 4
5 Todd Wellemeyer STL 4
5 Edwin Jackson DET 4
5 John Maine NYM 4
5 Matt Cain SFO 4
5 Kevin Slowey MIN 4
5 Matt Palmer LAA 4
5 Randy Johnson SFO 4
19 Andy Pettitte NYY 3
19 Livan Hernandez NYM 3

# Player Team WHIP
1 Jake Peavy SDG 0.87
2 Justin Verlander DET 0.90
3 Zack Greinke KC 0.91
4 Johnny Cueto CIN 0.95
4 Jered Weaver LAA 0.95
6 CC Sabathia NYY 0.96
7 Scott Feldman TEX 1.01
8 Roy Halladay TOR 1.04
8 Edwin Jackson DET 1.04
8 Josh Outman OAK 1.04
11 Mark Buehrle CHW 1.06
11 Dan Haren ARI 1.06
11 Rick Porcello DET 1.06
14 Ted Lilly CHC 1.08
14 Brian Tallet TOR 1.08
16 Matt Palmer LAA 1.10
16 Javier Vazquez ATL 1.10
18 Scott Baker MIN 1.11
18 Zach Duke PIT 1.11
20 Tim Lincecum SFO 1.12

# Player Team ERA
1 Rick Porcello DET 1.50
2 Justin Verlander DET 1.52
3 Zack Greinke KC 1.57
4 Roy Halladay TOR 1.76
5 Jake Peavy SDG 2.13
6 Jered Weaver LAA 2.30
7 Edwin Jackson DET 2.34
8 Randy Wolf LAD 2.35
9 Josh Beckett BOS 2.38
10 Johan Santana NYM 2.43
11 Matt Cain SF 2.45
11 Josh Outman OAK 2.45
13 Mark Buehrle CHW 2.55
14 CC Sabathia NYY 2.56
15 Clayton Kershaw LAD 2.57
15 Cliff Lee CLE 2.57
17 Scott Feldman TEX 2.70
17 Livan Hernandez NYM 2.70
19 Johnny Cueto CIN 2.72
19 Josh Johnson FLA 2.72

RK PLAYER TEAM SV SO
1 Heath Bell SDG 15 26
2 F. Cordero CIN 14 22
2 F. Rodriguez NYM 14 27
4 Trevor Hoffman MIL 13 14
4 Ryan Franklin STL 13 16
4 Brian Fuentes LAA 13 19
4 Brad Lidge PHI 13 26
4 J. Papelbon BOS 13 28
9 Bobby Jenks CHW 12 15
9 Chad Qualls ARI 12 23
9 Matt Capps PIT 12 12
9 Brian Wilson SFO 12 23
13 Mariano Rivera NYY 11 26
13 Frank Francisco TEX 11 19
13 George Sherrill BAL 11 21
13 Jonathan Broxton LAD 11 39
17 Joe Nathan MIN 10 22
17 Fernando Rodney DET 10 17
17 Matt Lindstrom FLA 10 22
20 Kerry Wood CLE 8 21