New and Updated

I have a bunch of ideas buzzing around in my head and that I have either finished or am working on. As a result, I've created this page to make it easier for my clients to keep track of everything I'm working on and thinking about.

Hitting Drills

The following is a master list of all of the hitting drills, games, and gadgets that I use with hitters and links to a discussion of the often different or unique way that I use each drill.

Fixing Bat Drag

There are a number of drills that I use when working with hitters with Bat Drag...

Primary Bat Drag Drill

Common Drills

Signature Drills

Proprietary Drills

Hitting Mechanics 101

The following drills, as well as all of the drills above, are available to purchasers of Hitting Mechanics 101...

Signature Drills

Basic Drills

Hitting Gadgets and Games

Hitting for Average

The following drills, as well as all of the drills above, are available to purchasers of Hitting for Average... 

Signature Drills

Key Concept Drills

Training and Conditioning

Hitting for Power

The following drills, as well as all of the drills above, are available to purchasers of Hitting for Power... 

Signature Drills

Chris O'Leary's Hitting Diaries

I am frequently asked how and what I work on with hitters. As a result, I have put together a number of hitting diaries that discuss what I have worked on with my players, clients, and other hitters whose swings I have consulted on.

My College Hitters

One of my hitters hit...

  • .276 in 2015
  • .419 in 2016

Another hit...

  • .315 in 2015
  • .373 in 2016.

A third hit...

  • .257 in 2015
  • .330 in 2016.

How did they achieve such dramatic improvements? I discuss, in detail, the tweaks I suggested in my...

Clients may also read my VERY important piece on...

Mark Trumbo

Mark Trumbo contacted me in 2014 in an effort to improve his ability to hit for average while retaining his power. He thought his problems might be due to Bat Drag. They turned out to be due to a problem with his Timing, and I shared with him some things I learned as a result of my experience with Andres Torres.

Matt Holliday

During 2016, Matt Holliday made a change that hurt his Z-Axis Adjustability. On August 8, 2016 I made a comment about that change to someone I know and made a suggestion that made its way to Matt Holliday. if you compare Matt Holliday's numbers before and after August 8, 2016, it's obvious that my suggestion had a major impact on his swing. Prior to August 8, Matt Holliday hit .238. After August 8, Matt Holliday hit .462.

Albert Pujols

Curiously, Albert Pujols developed the same Z-Axis Adjustability problem in 2011 that Matt Holliday did in 2016, due to what I believe is a problem with how the Cardinals organization teaches hitting. I had a conversation about the problem with Andres Torres, who then communicated my concerns to Pujols. Why do I believe that Memorial Day 2011 conversation had an impact? From April-May 2011 Albert Pujols hit .262. From June-September 2011 Albert Pujols hit .318.

Jhonny Peralta

Jhonny Peralta's problem was due to something that I call a True Loop and that I first noticed as a result of Colby Rasmus' struggles and how his swing changed over the years. In short, a True Loop is a loop in the swing that results from an effort to fix a (phony) loop in the swing. I made someone I know in the Cardinals organization aware of the issue, and Peralta made some effort to correct the problem, which I believe contributed to his up-swing at the end of the 2016 season.

Tommy Pham

I worked with Tommy Pham from 2010 until late September 2015. During one 10-day period, he put up 1.0 bWAR of value.

In 2016, when he stopped listening to me, Mr. Internet Guy, and started listening to his pro coaches, Tommy Pham hit .226.

Matt Adams

I don't know if my advice made it to Matt Adams, but here is what I suggested.

The gist was that he needed to get into his legs. To widen his stance. To bend his knees. He's too tall, perhaps in an attempt to get extension and leverage.

Stephen Piscotty

I don't know if my advice made it to Stephen Piscotty, but here is what I suggested.

The starting point was to get him to open up his front foot. At a minimum, Stephen Piscotty is at significant risk for lower body problems for the reasons I lay out in my theory of lower body injuries in hitters and like Albert Pujols has.

There's also the issue that a closed front foot can limit hip rotation and thus power. The logic behind a closed front foot is just terrible, given that it's designed to keep the hips closed. If the hips are the key source of a hitter's power, why exactly would you want to keep them closed into contact, which is what is accomplished by keeping the front foot closed into contact.

Stephen Piscotty's extremely closed front foot also reduces his adjustability and creates problems similar to what Pujols and Holliday experienced.

Anybody sensing a pattern?

Andres Torres

My discussion of my experience with Andres Torres gives an overview of my work with Andres Torres. My hitting diaries give some specifics.

My Younger Son

Master Index

The purpose of this master index is to give people a single place to keep track of the changes that I am continually making to the contents of all of my webbooks. Please note that the articles marked with  are works in progress and those marked with are only accessible to people who purchases my Advanced Hitting Mechanics webbook.

Executive Summary
. The High-Level Swing

Getting Started

What a Good Swing (Actually) Looks Like
. Andres Torres' Swing
. Very Important Pics and Clips
... Very Important Pictures 
... Very Important Clips 
. (Pretty Much) Everything In a Single Picture...
... The Role of the Hands
. Bryce Harper's Swing
. Secrets of Albert Pujols' Swing 
. Carlos Beltran: A Most Teachable Swing
. Matt Carpenter: A Swing of Beauty
. Style vs Substance

Guru Guides
. Mike Epstein
... Strengths and Weaknesses of the Epstein System 
... Advice for Clients of Mike Epstein
. Don Mattingly

First, Do No Harm
. Phony Flaws
. Myths About Hitting
. Misconceptions About Hitting
. Bad or Problematic Hitting Cues
. Bad or Problematic Hitting Drills

The (Relatively) Absolutes and Non-Absolutes of Hitting
. The Problem with the A to C Swing
... The Myth of the A to C Swing
... Short to the Ball...
... The Secret of Don Mattingly's Swing
. Disproportionate Power
... The Secret of Mickey Mantle's Swing

Understanding the Swing 
. The Anatomy of the Swing
... The Anatomy of Andres Torres' Swing 
... The Anatomy of Albert Pujols' Swing 
... The Anatomy of Caitlin Benyi's Swing
. The Stages of the Swing
... Set-Up
...... The Grip
... Gather
... Shift and Load
... Rotate
...... PC-C-P 
... Finish
. Milestones
... CHin On Front Arm (CHOFA) 
... Shaft To Shoulder (STS)
... Point Of Contact (POC)
... Wrap
. Shapes
... Vertical V
... Power L

Concepts
. Core Concepts
... Swing Plane
...... Reverse C  
...... Slight Uppercut
......... Swing Plane, Tilt, and Alignment 
...... The Myth of Backspin
... Connection
...... Connection vs. Extension
...... Curved Hand Path  
......... Connection and the Curved Hand Path
...... The Box, The L, and The Parallelogram
...... Vertical V
...... The Role of the Back Arm and the Top Hand 
...... Knob to the Ball and Connection
... Rotation
...... Williams, Lau, and the Front Foot
... Bounce
...... Posture
...... Start Low and Stay Low
. Hitting for Average
... Compactness
...... The Inside-Out Swing
...... Short to the Ball...
...... Keeping the Hands Inside the Ball 
... Alignment
...... Tilt and Alignment
... Tilt
... Adjustability 
...... X-Axis Adjustability 
......... X-Axis Adjustability and Hip Rotation 
...... Y-Axis Adjustability 
......... Tilt
............ Tilt and Alignment
............ Tilt and Hitting the Pitch Low and Away
...... Z-Axis Adjustability 
......... Delaying Mechanism
...... Adjust Late
...... Lean
... Timing
...... Yes, Yes, No
. Hitting for Power
... Coil
...... The Secret of Ted Williams' Swing 
...... Coiling and Cocking the Hips
...... Favorite Coil Clips  
... PC-C-P
... Separation 
...... The Hips Lead the Hands   2015.9.21 
... Loading
...... When in Doubt...
...... Ways Hitters Load
......... Loading the Hands
......... Stretching the Bungee Cord
......... Walking Away from the Hands
......... Running Start
......... Resisting Movement 
............ Resisting Movement or Hitch?
......... Scapular Loading
... Overlap   
... Whip
...... The Secret of Stan Musial's Swing 
...... The Secret of Mickey Mantle's Swing 
...... Stopping the Knob 
......... Acceleration, Deceleration, and Whip
......... The Triple Pendulum and Ben Hogan's True Secret? 
......... Whip and the Back Elbow
...... The Role of the Hands
......... Whip and the Grip
...... Hinge, Hold, and Release
......... Hinge Angle
...... Judging Whip
......... Whip Position 
......... The Myth of the Brace Position 
...... Reducing the Radius
...... Stalling the Barrel 
...... Frequently-Asked Questions about Whip
... Level of Effort
...... Why Albert Pujols Isn't Himself in Home Run Derbies

Evaluating The Swing
. Video Cameras
. Five Frame Swing
. Checkpoints 
. Sequencing
... Heel Hop
. Synchronization
... The Front Elbow and the Barrel
. Developing Your Eye
... Youth Hitter One

Developing The Swing
. Deliberate Practice 
. Swing Development Program
... Drills: How and Why They are Like Medicine
... Should we Teach Hitting by Drilling or by Hitting?
... Start Every Batting Practice Session with...
... Where to Start?
. Back Foot   
... The Move   
... Matt Holliday's Back Foot 
... Stay Back 
...... The States of Derek Jeter's Swing
. Power Position 
. Shapes
... The Box, The L, and The Parallelogram
... Elbow Linkage, The Triangle, and the Triangular Pyramid
...... Elbow Linkage
... Power L
... Vertical V
...... Inverted Triangle
. Good Hitting Cues 
. Good Hitting Drills
. What to Teach When
... Basic Hitting Mechanics  
... Middle School
...... Fifth Grade Hitting Diary (11U)
......... Fixing Bat Drag
............ Back Arm Constraint Drill
............. Get Your Back Elbow Up?
...... Sixth Grade Hitting Diary (12U)
...... Seventh Grade Hitting Diary (13U)
... High School and Beyond
...... The Most Common Problem in Older Hitters
...... The Myth of the A to C Swing 
......... Problems Related to the A to C Swing 
............ Short to the Ball... 

Hitting Flaws and Fixes

Hitting Problem Troubleshooter

Hitting Flipscreens

Hitting Flipbooks

Model Swings

New & Updated Flipbooks

I have been working on a number of new flipbooks, including analyses of the swings of...