Kenley Jansen broke the all-time strikeout rate record

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I wrote last week about how Kenley Jansen had the second-highest strikeout rate in baseball history, but the Dodgers rookie was so dominant down the stretch that he vaulted into the top spot.

Jansen ended up striking out 34 of the final 56 batters he faced this season–which is absolutely ridiculous–and finished the year as the first pitcher in baseball history with more than 16.0 strikeouts per nine innings.

Here’s the new all-time leaderboard (among pitchers with at least 40 innings):

                  YEAR     SO/9
KENLEY JANSEN     2011     16.1
Carlos Marmol     2010     16.0
Eric Gagne        2003     15.0
Billy Wagner      1999     15.0
Brad Lidge        2004     14.9

Jensen racked up 96 strikeouts in 53.2 innings while posting a 2.85 ERA and .159 opponents’ batting average. Not bad for a 23-year-old rookie who was a light-hitting catcher in the minors as recently as two seasons ago.

Report: Glen Perkins will retire from baseball

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According to MLB.com’s Rhett Bollinger, Twins GM Thad Levine told 1390 Granite City Sports that reliever Glen Perkins will retire.

Perkins, 34, has battled shoulder injuries over the last two years, limiting him to a total of 7 2/3 innings between 2016-17. His decision doesn’t come as much of a surprise given the circumstances. The Twins declined his $6.5 million club option back in October, making him a free agent.

Across parts of 12 seasons, all with the Twins, Perkins compiled a 3.88 ERA with 120 saves and a 504/158 K/BB ratio in 624 1/3 innings. He ranked among baseball’s best closers from 2013-15, racking up 102 of those saves with a 3.08 ERA. The lefty made the American League All-Star team in each of those three seasons.