Which pitchers have the best tools in Major League Baseball? Here are my rankings in eight categories.

Best fastball

1. Aroldis Chapman
Cincinnati Reds
Last year's No. 1: Chapman

I'm not sure how anyone could top this; it's the hardest fastball in baseball history, and perhaps the upper bound of how fast a human being can throw a baseball. (Of course, when the cyborgs arrive in MLB, all bets are off.) His average velocity (per Pitch F/X) is nearly 2 mph greater than the next-best average among relievers, and of course way above the hardest-throwing starter.

2. Max Scherzer, Nationals
3. Chris Archer, Rays
4. Jacob deGrom, Mets
5. Sonny Gray, Athletics
6. Dellin Betances, Yankees
7. Chris Sale, White Sox
8. Dallas Keuchel, Astros
9. Scott Kazmir, Astros
10. Noah Syndergaard, Mets

Best slider

1. Chris Archer
Tampa Bay Rays
Last year's No. 1: Clayton Kershaw

Archer might win the "best stuff" award among starters, possessing a plus fastball, slider and changeup combination that has him fifth in the majors this year in swinging-strike rate (Kershaw and Sale are 1-2). When I tabbed Archer for a breakout prior to 2014, readers thought I was too optimistic, but his pure stuff -- especially the slider -- is why I liked him, and why he has cut his FIP by a run and a half in the past two seasons.

2. Tyson Ross, Padres
3. Francisco Liriano, Pirates
4. Clayton Kershaw, Dodgers
5. Corey Kluber, Indians

Best cutter

1. Jake Arrieta
Chicago Cubs
Last year's No. 1: Kenley Jansen

Arrieta's hybrid cutter-slider thing has been a huge part of his transformation from ex-prospect with Baltimore to ace with the Cubs, along with the Cubs' work on slowing down his tempo so his delivery would be more consistent start to finish (leading to massively improved command). His pitch is hard like a true cutter but will show the tilt and longer break of a slider.

2. Kenley Jansen, Dodgers
3. Shelby Miller, Braves
4. Mark Melancon, Pirates
5. Will Harris, Astros

Best curveball

1. Clayton Kershaw
Los Angeles Dodgers
Last year's No. 1: Sonny Gray

Public Enemy No. 1 remains the most aesthetically pleasing pitch in the game to my eyes, although you could make a strong case for Kluber's curve, which has been the most effective in the game since the start of 2014, or Felix's, which leads MLB this year. Kershaw's ERA was lower in 2014, but he's actually striking out hitters at the best rate of his career right now, with the curveball still his primary out pitch.

2. Felix Hernandez, Mariners
3. Corey Kluber, Indians
4. Craig Kimbrel, Padres
5. Sonny Gray, A's

Best changeup

1. Zack Greinke
Los Angeles Dodgers
Last year's No. 1: Felix Hernandez

Greinke's changeup is outstanding, but it's just as much about how he uses it -- or how he uses all of his pitches, really, including adding and subtracting from the fastball as needed. Greinke may have the best understanding of how to set up hitters and put them down of anyone in baseball, as he's always trying to outthink opposing hitters and has the weapons to execute his plan.

2. Felix Hernandez, Mariners
3. Chris Sale, White Sox
4. Francisco Rodriguez, Brewers
5. Cole Hamels, Rangers

Best splitter

1. Nate Eovaldi
New York Yankees
Last year's No. 1: Masahiro Tanaka

I gave the edge to Eovaldi, whose splitter is new this year and has developed quickly from a below-average pitch in April to a plus pitch now, over Danny Salazar because Salazar's is more of a hybrid split-change. Eovaldi's splitter doesn't have huge tumble, but he throws it for strikes enough that it gives him the true change-of-pace weapon he's been looking for since he was a Dodgers prospect.

2. Danny Salazar, Indians
3. Zach Putnam, White Sox
4. Matt Shoemaker, Angels
5. Koji Uehara, Red Sox

Best knuckler

1. R.A. Dickey
Toronto Blue Jays
Last year's No. 1: Dickey

I'm just glad this list has two members for the first time in I don't know how many years.

2. Steven Wright, Red Sox

Best command

1. Clayton Kershaw
Los Angeles Dodgers
Last year's No. 1: Kershaw

It has become trendy to run Kershaw down on trivial complaints -- the "doesn't pitch well in October" one is my favorite, as it's based primarily on one bad start and one hanging breaking ball to Matt Adams -- but he is the best pitcher in baseball today and one of the very best I've ever seen, comparable to peak Roger Clemens in combination of raw stuff and ability to locate everything. Kershaw doesn't have the best control -- that's probably Minnesota's Phil Hughes -- but he does have the best command, the ability to put pitches where he wants them and get consistent release points and action on his entire repertoire.

2. Chris Sale, White Sox
3. Corey Kluber, Indians
4. Max Scherzer, Nationals
5. Koji Uehara, Red Sox