Top 20 Shutdown Relief Pitching Seasons in MLB History

Only 30 individual relief pitching seasons in MLB history meet all of the following requirements:

- at least 60 innings pitched
- an ERA+ of 250 or higher
- a WHIP of 0.90 or lower
- WAR of 3 or more
- K/BB ratio of 3 or higher

All but four of those occurred since 1990, which isn't surprising because of the increased specialization of relief pitchers, with special emphasis on having a "shutdown closer."

Appearing multiple times on the list:
Bryan Harvey - 1991 with the Angels, 1993 with the Marlins
Craig Kimbrel - 2012 and 2013 with the Braves
Joe Nathan - 2006 with the Twins, 2013 with the Rangers
Mariano Rivera - 2005 and 2008 with the Yankees

I wanted to make a list of the best shutdown seasons ever, factoring in the categories listed above as well as K/9 and OPS+ against.  You might notice (and even, possibly, object) that I'm neglecting saves.  Sorry, but the stat is almost completely meaningless.

Here are my top 20 shutdown relief seasons in MLB history....

1) Craig Kimbrel, 2012 Atlanta Braves
IP: 62.2
ERA+: 399 (4th)
WHIP: 0.654 (3rd)
WAR: 3.3 (24th)
K/9: 16.66 (1st)
K/BB: 8.29 (6th)
OPS+ against: 1 (1st)
Total ranking points: 39
Traditional stats: 3-1, 42 saves, 1.01 ERA

2) Eric Gagne, 2003 Los Angeles Dodgers  
He won the NL Cy Young for this season, and rightfully so.
IP: 82.1
ERA+: 337 (10th on the list)
WHIP: 0.692 (5th)
WAR: 3.6 (14th)
K/9: 14.98 (3rd)
K/BB: 6.85 (7th)
OPS+ against: 4 (2nd)
Total ranking points: 41
Traditional stats: 2-3, 55 saves, 1.20 ERA

3) Koji Uehara, 2013 Boston Red Sox
IP: 74.1
ERA+: 379 (7th)
WHIP: 0.565 (1st)
WAR: 3.6 (18th)
K/9: 12.23 (10th)
K/BB: 11.22 (3rd)
OPS+ against: 8 (3rd)
Total ranking points: 42
Traditional stats: 4-1, 21 saves, 1.09 ERA

4) Mariano Rivera, 2008 New York Yankees.  
Incredibly, he never won a Cy Young.
IP: 70.2
ERA+: 316 (17th)
WHIP: 0.665 (4th)
WAR: 4.3 (3rd)
K/9: 9.81 (21st)
K/BB: 12.83 (2nd)
OPS+ against: 10 (5th)
Total ranking points: 52
Traditional stats: 6-5, 39 saves, 1.40 ERA

5) Jonathan Papelbon, 2006 Boston Red Sox.  
IP: 68.1
ERA+: 517 (3rd)
WHIP: 0.776 (9th)
WAR: 5.0 (2nd)
K/9: 9.88 (20th)
K/BB: 5.77 (12th)
OPS+ against: 18 (12th)
Total ranking points: 58
Traditional stats: 4-2, 35 saves, 0.92 ERA

6) Dennis Eckersley, 1990 Oakland Athletics. 
He won a Cy two years later, but this year was better.
IP: 73.1
ERA+: 603 (2nd)
WHIP: 0.614 (2nd)
WAR: 3.3 (27th)
K/9: 8.96 (26th)
K/BB: 18.25 (1st)
OPS+ against: 13 (6th)
Total ranking points: 64
Traditional stats: 4-2, 48 saves, 0.61 ERA 

7) J.J. Putz, 2007 Seattle Mariners
IP: 71.2
ERA+: 319 (15th)
WHIP: 0.698 (6th)
WAR: 4.0 (8th)
K/9: 10.30 (17th)
K/BB: 6.31 (8th)
OPS+ against: 21 (14th)
Total ranking points: 68
Traditional stats: 6-1, 40 saves, 1.38 ERA

8) Billy Wagner, 1999 Houston Astros
IP: 74.2
ERA+: 287 (23rd)
WHIP: 0.777 (10th)
WAR: 3.8 (11th)
K/9: 14.95 (4th)
K/BB: 5.39 (17th)
OPS+ against: 10 (4th)
Total ranking points: 69
Traditional stats: 4-1, 39 saves, 1.57 ERA

9) Wade Davis, 2014 Kansas City Royals
IP: 72.0
ERA+: 399 (4th)
WHIP: 0.847 (17th)
WAR: 3.7 (16th)
K/9: 13.63 (6th)
K/BB: 4.74 (21st)
OPS+ against: 16 (8th)
Total ranking points: 72
Traditional stats: 9-2, 3 savs, 1.00 ERA

10) Fernando Rodney, 2012 Tampa Bay Rays
IP: 74.2
ERA+: 641 (1st)
WHIP: 0.777 (10th)
WAR: 3.8 (11th)
K/9: 9.16 (24th)
K/BB: 5.07 (19th)
OPS+ against: 18 (10th)
Total ranking points: 75
Traditional stats: 2-2, 48 saves, 0.60 ERA

11) Takashi Saito, 2007 Los Angeles Dodgers
IP: 64.1
ERA+: 319 (16th)
WHIP: 0.715 (7th)
WAR: 3.5 (20th)
K/9: 10.91 (13th)
K/BB: 6.00 (9th)
OPS+ against: 19 (13th)
Total ranking points: 78
Traditional stats: 2-1, 39 saves, 1.40 ERA

12) Rafael Betancourt, 2007 Cleveland Indians
IP: 79.1
ERA+: 307 (21st)
WHIP: 0.756 (8th)
WAR: 4.3 (4th)
K/9: 9.08 (25th)
K/BB: 8.89 (5th)
OPS+ against: 26 (19th)
Total ranking points: 82
Traditional stats: 5-1, 3 saves, 1.47 ERA

13) Bruce Sutter, 1977 Chicago Cubs
Like Eckersley, he won a Cy two years after his true best season.
IP: 107.1
ERA+: 328 (13th)
WHIP: 0.857 (19th)
WAR: 6.5 (1st)
K/9: 10.82 (14th)
K/BB: 5.61 (16th)
OPS+ against: 31 (23rd)
Total ranking points: 86
Traditional stats: 7-3, 31 saves, 1.34 ERA

14) Dellin Betances, 2014 New York Yankees
IP: 90.0
ERA+: 277 (25th)
WHIP: 0.778 (12th)
WAR: 3.7 (15th)
K/9: 13.50 (7th)
K/BB: 5.63 (14th)
OPS+ against: 26 (18th)
Total ranking points: 91
Traditional stats: 5-0, 1 save, 1.40 ERA

15) Joe Nathan, 2006 Minnesota Twins
IP: 68.1
ERA+: 284 (24th)
WHIP: 0.790 (14th)
WAR: 3.3 (25th)
K/9: 12.51 (9th)
K/BB: 5.94 (10th)
OPS+ against: 18 (12th)
Total ranking points: 94
Traditional stats: 7-0, 36 saves, 1.58 ERA

16) Aroldis Chapman, 2012 Cincinnati Reds
IP: 71.2
ERA+: 274 (26th)
WHIP: 0.809 (15th)
WAR: 3.6 (19th)
K/9: 15.32 (2nd)
K/BB: 5.30 (18th)
OPS+ against: 25 (15th)
Total ranking points: 95
Traditional stats: 5-5, 38 stats, 1.51 ERA

17) B.J. Ryan, 2006 Toronto Blue Jays
IP: 72.1
ERA+: 335 (11th)
WHIP: 0.857 (20th)
WAR: 3.5 (21st)
K/9: 10.70 (15th)
K/BB: 4.30 (24th)
OPS+ against: 17 (9th)
Total ranking points: 100
Traditional stats: 2-2, 38 saves, 1.37 ERA

18) Hung-Chih Kuo, 2010 Los Angeles Dodgers
IP: 60
ERA+: 324 (14th)
WHIP: 0.783 (13th)
WAR: 3.1 (29th)
K/9: 10.95 (12th)
K/BB: 4.06 (27th)
OPS+ against: 15 (7th)
Total ranking points: 102
Traditional stats: 3-2, 12 saves, 1.20 ERA

19) Greg Holland, 2013 Kansas City Royals
IP: 67
ERA+: 342 (9th)
WHIP: 0.866 (23rd)
WAR: 3.1 (30th)
K/9: 13.84 (5th)
K/BB: 5.72 (13th)
OPS+ against: 31 (24th)
Total ranking points: 104
Traditional stats: 2-1, 47 saves, 1.21 ERA

20) John Smoltz, 2003 Atlanta Braves
IP: 64.1
ERA+: 385 (6th)
WHIP: 0.870 (25th)
WAR: 3.3 (26th)
K/9: 10.21 (18th)
K/BB: 9.13 (4th)
OPS+ against: 36 (27th)
Total ranking points: 106
Traditional stats: 0-2, 45 saves, 1.12 ERA


Not good enough for the top 20:
1993 Harvey (108 points)
1998 Trevor Hoffman (116 points)
2005 Rivera (117 points)
1991 Harvey (121 points)
1987 Tim Burke (123 points)
1981 Rollie Fingers (125 points)
2013 Kimbrel (130 points)
1998 Michael Jackson (140 points)
2008 Joakim Soria (145 points)
2013 Nathan (149 points)

Aroldis Chapman, Reds Bullpen Aiming for History

Aroldis Chapman is known for two things - record-breaking heat and record-breaking strikeouts.  The Reds' 2012 bullpen, with a lot of help from Chapman, is on track to post some eye-popping numbers.

1) Chapman currently sits at 16.74 strikeouts per 9 innings.  That would be the highest rate in MLB history for any pitcher appearing in at least 25 games.

Only one other pitcher - Kenley Jansen for the Dodgers in 2011 - has ever topped 16 per 9.  Incidentally, the Braves' Craig Kimbrel is on track for a ridiculous number this year as well.  He has struck out 15.7 per 9 so far.

The Reds' Rob Dibble (in 1992) is one of only 13 previous pitchers ever to strike out more than 14 per 9 innings for a season.

2) The bullpen as a whole has struck out 10.18 batters per 9 innings.  That would be the highest rate in MLB history by any bullpen.

Only the 2010 Braves bullpen (led by Billy Wagner) ever topped 10 strikeouts per 9 innings.  They had a mark of 10.06.  The next-highest totals were posted by the 2011 White Sox and 2001 Cubs - both 9.8 per 9.

Chapman isn't the only one racking up Ks.  The other two guys in the top 3 for innings pitched in the Reds 'pen also have great strikeout rates - Sean Marshall 10.7 and Jose Arredondo 9.8.

3) The bullpen as a whole has an ERA of 2.64.  That is the best in MLB this season (by a fair margin) and it would be the best mark by any team's bullpen since the 2003 Dodgers (led by Eric Gagne's Cy Young-winning effort) posted a 2.46 ERA.

The 1942 St. Louis Cardinals had the lowest bullpen ERA ever (1.75) but the aforementioned '03 Dodgers bullpen had the best mark in comparison to the average bullpen ERA for that specific year (a remarkable 1.7 runs lower than the 2003 average).