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Kenley Jansen's MLB-record strikeout rate

Posted by Andy
Once again, strikeouts hit an all-time high in MLB in 2011. Check out the highest K per 9 innings numbers this past year (minimum 40 innings pitched):


Rk Player SO/9 IP Age Tm G GF SV H R ER BB SO ERA ERA+ BA OBP SLG OPS OPS+
1 Kenley Jansen 16.10 53.2 23 LAD 51 13 5 30 17 17 26 96 2.85 131 .159 .266 .228 .494 43
2 Craig Kimbrel 14.84 77.0 23 ATL 79 64 46 48 19 18 32 127 2.10 181 .178 .266 .233 .499 43
3 Al Alburquerque 13.92 43.1 25 DET 41 11 0 21 9 9 29 67 1.87 220 .142 .289 .149 .438 24
4 David Robertson 13.50 66.2 26 NYY 70 8 1 40 9 8 35 100 1.08 410 .170 .280 .226 .506 36
5 Sergio Romo 13.13 48.0 28 SFG 65 16 1 29 8 8 5 70 1.50 239 .173 .197 .262 .458 31
6 Sergio Santos 13.07 63.1 27 CHW 63 50 30 41 25 25 29 92 3.55 119 .181 .282 .314 .596 62
7 Rex Brothers 13.06 40.2 23 COL 48 6 1 33 14 13 20 59 2.88 157 .217 .308 .336 .644 71
8 Aroldis Chapman 12.78 50.0 23 CIN 54 13 1 24 21 20 41 71 3.60 109 .147 .325 .209 .534 53
9 Vinnie Pestano 12.19 62.0 26 CLE 67 20 2 41 16 16 24 84 2.32 172 .184 .272 .305 .577 62
10 Jonathan Papelbon 12.17 64.1 30 BOS 63 54 31 50 22 21 10 87 2.94 145 .207 .247 .299 .546 47
11 Carlos Marmol 12.04 74.0 28 CHC 75 61 34 54 33 33 48 99 4.01 98 .205 .344 .299 .643 82
Provided by Baseball-Reference.com: View Play Index Tool Used
Generated 11/23/2011.

These are all the guys to post a K/9 of at least 12. Kenley Jansen's 16.10 is just a ridiculous number. In fact, it's an all-time record (again, minimum 40 IP):

Rk Player SO/9 IP Year Age Tm G GF SV H R ER BB SO ERA ERA+ BA OBP SLG OPS
1 Kenley Jansen 16.10 53.2 2011 23 LAD 51 13 5 30 17 17 26 96 2.85 131 .159 .266 .228 .494
2 Carlos Marmol 15.99 77.2 2010 27 CHC 77 70 38 40 23 22 52 138 2.55 171 .147 .301 .199 .500
3 Eric Gagne 14.98 82.1 2003 27 LAD 77 67 55 37 12 11 20 137 1.20 337 .133 .199 .176 .374
4 Billy Wagner 14.95 74.2 1999 27 HOU 66 55 39 35 14 13 23 124 1.57 287 .135 .208 .212 .420
5 Brad Lidge 14.93 94.2 2004 27 HOU 80 44 29 57 21 20 30 157 1.90 230 .174 .254 .290 .544
6 Craig Kimbrel 14.84 77.0 2011 23 ATL 79 64 46 48 19 18 32 127 2.10 181 .178 .266 .233 .499
7 Armando Benitez 14.77 78.0 1999 26 NYM 77 42 22 40 17 16 41 128 1.85 241 .148 .260 .236 .496
8 Billy Wagner 14.55 60.0 1998 26 HOU 58 50 30 46 19 18 25 97 2.70 153 .211 .292 .312 .604
9 Billy Wagner 14.38 66.1 1997 25 HOU 62 49 23 49 23 21 30 106 2.85 141 .204 .299 .300 .599
10 Byung-Hyun Kim 14.14 70.2 2000 21 ARI 61 30 14 52 39 35 46 111 4.46 108 .200 .336 .346 .683
Provided by Baseball-Reference.com: View Play Index Tool Used
Generated 11/23/2011.

Jansen broke a record set all the way back in....ummm....2010. And Kimbrel posted the 6th-highest K/9 number this past year. That's what happens when the baseline (overall strikeouts in the game) keeps rising.

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