Based on the success of my "MLB's 10 Most Effective Curveballs" article, I decided to look at the 10 most effective sliders this season.
I'm measuring slider effectiveness by Pitch Type Linear Weights, which says how many runs a pitcher prevents above average every time he throws 100 pitches.
So, if I say a slider's effectiveness is one run above average, that means that every 100 sliders that pitcher throws, he allows one run less than average.
I set two ground rules. First of all, pitchers have to have thrown at least 30 innings this year. Second, they have to use the slider at least 10 percent of the time.
For each pitcher, I'll list the average slider velocity, average slider movement relative to an average major league fastball (if you want to know why I'm comparing it to a fastball, just ask), slider usage (how often the pitcher throws the slider), and slider effectiveness (as measured by Pitch Type Linear Weights).
Also, just to clarify, this is me taking the leaderboard on slider effectiveness, listing the top 10 pitchers, and analyzing their sliders' success. This is NOT a subjective list.
So don't tell me I'm "leaving somebody off." It's just the leaders in the stat and my analysis for why they're leading.
Let's take a look. You'll never guess who's No. 1.