Lokator Bullpen App Introduction

Posted on November 29, 2014 by Stephen Stemle | 0 comments

The Lokator Bullpen features 20 different bullpen sessions. Each bullpen sequence consists of 20 pitches. All are named according to the goals of the sequence and ranked by difficulty from easiest to hardest. Each session teaches and documents pitch command, selection, and sequencing.

Each bullpen features different methods and strategies of how to get hitters out. They were all practiced and executed in games to get help get Steve Stemle, the inventor of the Lokator Target and System, to the Major Leagues. They were also crucial tools he used when teaching young pitchers the chess match between the hitter and pitcher while coaching and working at various academies.

This blog gives descriptions of exactly what pitchers are trying to accomplish during each bullpen and the reasoning behind the method so parents and coaches can relay information to each pitcher while throwing the bullpen.

Once a pitcher creates a profile and selects a bullpen to throw it's time to play ball. The target screen will display the pitch number in the sequence, what Lokations to aim at, and which pitch to throw. Below this information a Lokator Target will have targeted zones highlighted making visualization and communication easy for the scorekeeper.

When the pitch is thrown at the designated Lokation a teammate, coach, parent, (scorekeeper) will touch the target on the screen where the ball actually hit.  The App will show a check if the Lokation is hit or an X if it is not. This is where the retries function comes into play.

Pitchers have the option to choose between 1 and 4 retries for missed targets on the bullpen selection screen. If pitchers choose the 0 retry option, then bullpens will always be 20 pitches. If they were to choose 4 retries, then it's possible that the bullpen could be 80 pitches long if no Lokations were hit. This feature enables pitchers to make adjustments from pitch to pitch, throw longer bullpens, and get rewarded for hitting Lokations early and often when competing for a high ranking by Lokator Score.

In addition to the retry feature on the bullpen selection screen there is also a distance option to select how far each pitcher is from the target. This comes in handy for pitchers who throw at different distances or if pitchers are not throwing from full distance so everybody is on the same playing field.

When the bullpen has been completed, statistics in four categories are automatically stored in the App database. Two of the categories use the Lokator Score to judge effectiveness and rank each pitcher according to targets hit and the number of pitches it took to hit each target. The remaining two reports are Accuracy Reports. The first one gives a percentage of total targets hit for each individual bullpen and the other gives percentages of hits for each individual target of the Lokator design.

After the Bullpen is over and the reports have been generated, check to see how well you did with Lokator Scores and Accuracy Reports. Look at how you are matching up against other pitchers on the team or friends in the neighborhood with report rankings.  Then use the email function to report statistics to anyone right from the Report Screen. 

The Lokator Bullpen will guide pitchers through all Lokations with every pitch in a way that doesn't favor just the pitcher's strengths. When pitchers enter the Lokator Bullpen they get the most well rounded bullpen session possible and we know from experience that this is the best way to improve.

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Lokator Bullpen App Pitching Statistics Accuracy Reports

Posted on May 22, 2013 by Stephen Stemle | 1 comment

Along with the Lokator Score Report formula we discussed in our previous blog post, we also feature two other reports called Accuracy by Target and Accuracy by Bullpen.  Instead of ranking all pitchers with a formula like we have done with the Lokator Score, the Accuracy by Target report measures percentages of individual Lokations hit and the Accuracy by Bullpen documents overall percentages of whole bullpens.  

It is very beneficial for pitchers, catchers, and coaches to understand each pitcher's hot and cold Lokations.  The Target Accuracy Report statistics compiled during bullpen work can give insight when determining pitch selection, sequencing, and Lokation during games. On the top of the Target Accuracy Report Screen a running total of Lokations hit and total number of attempts is displayed so you can see your percentage of all pitches combined.  

Accuracy by Target percentage statistics for every Lokation can be thought of as a report card for all Lokations and results can be used to form an evaluation of strengths and weaknesses.  Lower percentages need to be focused on more often during practice while higher percentage Lokations need to be utilized more in game situations.  It's important to recognize which Lokations you command the best and then learn Bullpens Sequences that match your strengths.

Accuracy by Bullpen reports will list all 20 bullpens for each individual pitcher and give TOTAL percentages of how well the pitcher commands each bullpen as a whole.  So if you throw one bullpen ten times, the App will calculate totals from each session and display an average of how often you hit Lokations within each bullpen sequence.  This feature makes it simple to understand which bullpens you throw the best and then allows you to easily put them in your game plan.  

Understanding pitchers strengths and weaknesses will help coaches make better decisions when calling pitches from the dugout and will play a factor when deciding who to use in the bullpen.  For example, if there is a pull hitter coming up to bat with a bullpen pitcher ready to go in the game, the pitchers Target Accuracy Report Statistics for the opposite side of the hitter is very valuable information.  If the bullpen pitcher is has high percentages on the inner half of the plate and not the outer half, they might not be the best option because pull hitters usually like the inside fastball and struggle with Lokations away.  

There are numerous examples of how Accuracy Reports can be used for pitchers, catchers, coaches, and scouts.  Our goal is to give you a steady stream of content explaining how to get the most out of the Lokator and System.  We have big plans about partnering with scouting services and colleges to we can bring the two together like never before.  Stay tuned!       

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Lokator Score Formula Pitching Statistic

Posted on April 20, 2013 by Stephen Stemle | 0 comments

Pitchers will have the opton to compete against each other in four different categories.  Two reports pitchers will be graded on use the Lokator Score to rank pitchers by bullpen or overall average. We thought we would give you the formula we used when creating this groundbreaking stat and the method behind the madness .

Every bullpen consists of 20 pitches, the 20's in the equation represent the number of steps in the sequence. 

Total pitches thrown refers to when 2, 3, or 4 retries are selected on the Bullpen Selection Screen.  If you select 4 retries and hit no Lokations during the bullpen, you would throw 80 pitches.  If you hit every Lokation then your total pitches thrown would be 20.  All other total pitch numbers will be between 20-80, but they're very rarely the same unless retries are turned off.    

We wanted to give pitchers who kept their pitch count down a higher score than those who took a number of retries to hit the Lokation. We also wanted to give pitchers a chance to make adjustments immediately and try the same pitch in the same Lokation on ensuing pitches if desired.  Retries also allow pitchers to throw longer bullpens depending on Lokations hit.  

The more Lokations you hit, the quicker you get outs, and the longer your outings.  A great aspect of pitching is it doesn't always take more pitches to have longer outings.  Efficiency is always at a premium and the Lokator Score accounts for this skill. See the pitch count blog post in the Misc section here to read about why we think pitch per inning average should be a common stat.

The Sequence Difficulty is ranked on a 1-20 scale.  20/ 20 is the easiest and 1/ 20 is the most difficult.  The most difficult bullpens will yield the highest scores much like in Olympic Diving or Gymnastics.  If you throw the easiest bullpen (The Breathing Zone) and hit 20/ 20 Lokations with no misses your score is .810, the best you can do for that sequence.  If you throw the most difficult bullpen (Big League Sequence) and do not miss a Lokation, your score will be 1.00.  The bullpens are weighted by difficulty.  


Think about your Lokator Score Average like a hitter thinks about a batting average, RBI, and home run stats combined.  The Lokator Score is the first tool our Academy is releasing to grade and promote competition among friends and teammates.  We are excited about releasing new forms of competition and statistics with the Lokator as the medium for all!

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Substitute Change Up for Breaking Ball

Posted on April 18, 2013 by Stephen Stemle | 0 comments

In the Lokator Bullpen App there are 20 Bullpens available to choose from and 6 of those are designed for pitchers who are too young or do not feature a breaking pitch.  For the pitchers who want to throw a more difficult bullpen with their fastball and change up, but do not have feature a breaking pitch, they can use the change up in place of the breaking pitch.   

Another option is to tap the skip button on the breaking pitches, but when you skip a pitch it is counted as a missed target.  This option comes in handy when two young pitchers are competing against each other and neither throws a breaking pitch but want to raise the difficulty level by selecting a bullpen difficulty of 1-12.  Results will be fair in the competition if both pitchers are skipping the same pitches.

It can get tricky when one pitcher throws only a change up and another pitcher throws only a breaking pitch while competing against each other because there are only 2 fastball only sequences.  When a situation like this arises then it is important to agree on the bullpen being thrown and the pitches that will be substituted BEFORE starting.  Then if reports are emailed make sure to type in notes at the bottom to explain any substituted pitches.


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