Kenley Jansen over his career has thrown 436.1 innings, has struck out 40.1% of batters faced, walked 7% to go with a .64 HR/9. He’s been worth 15.4 WAR over his career, which is pretty good for a reliever. His last 2 years, he’s basically done away with those walks, walking 4% and 4.4% of batters. And this year, he’s down to 0%. Yes, that’s right, he’s walked no one this year. Yes, I know he’s a reliever and he’s only thrown 27.2 innings this year, but it’s still pretty impressive. His 45% K-BB% would be the best since 1946, except Craig Kimbrel this year exists with his 49.5% K-BB%. But, the thing that makes Kenley Jansen so amazing is that unlike pretty much everyone else, he really only throws one pitch over and over again (Kimbrel throws fastball, curve). Once Jansen mostly junked his slider earlier in his career he’s thrown his cutter nearly 90% of the time, which is similar to the great Mariano Rivera. Kenley Jansen is able to get Major League hitters out throwing one pitch over and over again and is one of the main reasons why the Dodgers pen is so good. Now I know you’re saying – this is a DFS article, why is Kenley Jansen being discussed? Well, first of all, you actually can play relievers (just unclick the “Show Probable Pitchers Only” button), and there actually are some theoretical situations where you can justify it (2 or 3-game slates with a juicy Coors matchup is the most obvious one). But more importantly, with baseball (correctly) moving more and more to the “starting pitcher goes 5-6 innings, 7 innings tops, and the bullpen handles the rest”, bullpens become more and more relevant for analyzing whether or not a hitter has a good matchup. If the hitter is going to get 2 at-bats against the starter and then 2 at-bats against relievers, a batter facing a weak Dodgers starter becomes less attractive if half of his at-bats will be against Ross Stripling and Kenley “I Just Get Hitters Out With One Pitch, Man” Jansen. Meanwhile, facing the Twins becomes that much more attractive when their best reliever is Chris Gimenez. So while your main focus when analyzing a hitter’s matchup should always be on the starting pitcher, the bullpen is absolutely part of the equation so ignore it at your own peril.
On to the picks once Kenley Jansen walks a batter…
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Please, blog, may I have some more?