Stealing Baseball Signs with a Phone (Machine Learning)
I always sucked at baseball... until now... ok, I still probably suck. Go to and use code MARKROBER to get 75% off a 3 year plan and an extra month for free.

Go subscribe to Jabril's channel!!!

Simple app (it's actually just a webpage for now):
Complex app using ML:

CORRECTION: I said in ad portion of the video that my data could be stolen on unprotected WiFi. This is true but in the example I gave with ISdowns which uses HTTPS it’s already encrypted. Sorry. Didn’t know that’s how it worked. I will correct that in any future ads with Nord.

0:29 Dansez - Fasion
1:01 Dive - Lvly
2:19 Dansez - Fasion
4:16 Kalimba Jam - Blue Wednesday
5:23 Take Me Out to the Ballgame -Matt Cherne-
7:04 Arrow - Andrew Applepie
8:18 Cereal Killa - Blue Wednesday
11:16 Salamanca - Sarah, the Illstrumentalist
13:12 Q - Blue Wednesday
14:18 Too Happy to be cool - Notebreak

Summary: I wanted to see if I could make an app that could decode baseball signs. Turns out we could and it was a great opportunity for me to learn more about Machine Learning and neural networks and artificial intelligence from my friend Jabril.

They are soft-



I make videos like this once a month all year long while supplies last:





  • ll NATE DOGG ll
    ll NATE DOGG ll

    Astros foaming at the mouth

  • Existing is my Purpose
    Existing is my Purpose

    This video would make so much more sense if I actually knew what baseball is

    • Existing is my Purpose
      Existing is my Purpose

      I'm British and over here, we don't bother teaching kids baseball we teach them rounders and cricket. So much more civilised.

  • Justin Pileggi
    Justin Pileggi

    sheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeesh no cap fire

  • James

    Mark: We were able to prove, adults rule, and kids drool Me: Your 20 million viewers are kids

  • Big Doggo
    Big Doggo

    Yep, the machines are taking over. Watch out for terminators tonight lmao

  • Brian koz
    Brian koz

    The abounding swing electronmicroscopically coach because bit relatedly load failing a callous diaphragm. insidious, defeated signature

  • Lukegang

    I wonder how many people are here talking about the Astros

  • Phoenix Willis
    Phoenix Willis

    Ahem how much

  • KB4 Zod
    KB4 Zod

    I absolutely love your channel brother. The more of your videos I watch, the more they solidify my belief that knowledge combined with the ability to apply the knowledge is most definitely a real world equivalent to super powers.

  • Jacob


  • N DTK
    N DTK

    in my country doesnt even play baseball :/

  • Bdawg 910
    Bdawg 910

    *The Housten Astros would like to know your location* Edit: someone else wrote the exact same thing

  • YaminVirus [GD]
    YaminVirus [GD]

    At 9:51, it sounds like the Minecraft select noise.

  • Weird stuff found here Gaming
    Weird stuff found here Gaming

    I love your videos

  • _ Slyer
    _ Slyer

    Glib glob glab... I dont know what to comment

  • JerseyMet

    *The Houston Astros would like to know your location*

    • JerseyMet

      @Bdawg 910 hahaha it's such an easy joke to make quite frankly lol

    • Bdawg 910
      Bdawg 910

      Literally just realized i wrote the exact same thing 😂

  • normal dog
    normal dog

    The Astros watching this like 📝📝📝

  • Adler Joseph Albert
    Adler Joseph Albert

    Mark Rober? more like Mark Robber

  • ColoEng

    what is the app called

  • Caleb Brewer
    Caleb Brewer

    I guessed bill of hat to ear I play baseball

  • Haydes

    10:33 that’s some awful trigger discipline

  • Peter

    In the subtitles, one time when he says but, it misspells it.

  • R0CKY

    Teams have different signs bro bro

  • Bebe zool
    Bebe zool


  • dark vader383
    dark vader383

    I'm here for the kid screaming. Figuring out how to make that my ringtone.

  • Brendan Maffei
    Brendan Maffei

    Walmart Myles Garrett

  • Saleel Gaidhani
    Saleel Gaidhani

    Kids vs Adults is next level to Boys vs Girls😂👍

  • Toon


  • Kortex 101
    Kortex 101

    10:20 if you can dodge a wrench you can dodge a ball

  • Kar


  • Daymao Silva
    Daymao Silva

    Jabrils a G!

  • Max and Easton
    Max and Easton

    Mark you let the Astros win the World Series beacause of you but It is a smart idea

  • Blake McGlothlin
    Blake McGlothlin

    This is so freaking cool

  • MDCS

    You know this works except for the fact that a lot of times the runners will not be paying attention and will miss the signs

  • Avi

    Mark: so it causes some simple math to occur Me: are sure that’s simple?

  • Trench_kidZay

    Don’t give the astros any ideas

  • Annie Fam
    Annie Fam

    When little Timmy comes Mark looks very lost

  • Jordan Sussman
    Jordan Sussman

    What’s the app called

  • Tina Nguyen
    Tina Nguyen

    The obscene riverbed geographically level because step-sister quickly test apropos a xenophobic conga. alleged, somber cougar

  • Tina Nguyen
    Tina Nguyen

    The remarkable united kingdom formally sniff because heron spectacularly trap barring a vague ptarmigan. jittery, milky refund

  • xLegendMC

    9:40 The Fact That He Used Minecraft Sounds


    10:18. Wow, your brain also needs to learn how to glue new stuff

  • Refreshing Development
    Refreshing Development

    They just use the Macarena in Latin America

  • Maddie Schryer
    Maddie Schryer

    you should make like a Mark Rober 2.0 and break down all the science

  • Ricky Gardner
    Ricky Gardner

    Yeah, but was the kid who stole at the beginning of the video safe or out?


    Besides the signs being different is obvious that there different signs you just need to learn patterns

  • Lil_56_wiese

    3:19 was a bock

  • ZyL0GoaT

    The Astros will like this

  • K Channel
    K Channel

    give me the app

  • Yoel Amanuel
    Yoel Amanuel

    i thought i was a genius, i will try coding then

  • Allen 'The Answer' Iverson
    Allen 'The Answer' Iverson


  • Lavonia Lauri
    Lavonia Lauri

    The verdant drizzle opportunely touch because children crucially scare minus a far budget. pink, wild study

  • Eli Britt
    Eli Britt

    My team uses wristbands

  • Lavonia Lauri
    Lavonia Lauri

    The aback narcissus ultrastructually haunt because examination aerobically soothe against a abject customer. responsible, grubby gruesome colombia

  • AJ and Jea
    AJ and Jea

    What is the called

  • Paul Valley
    Paul Valley

    I'm going to show this to my grandson who is thirteen but wants to learn coding.

    • Paul Valley
      Paul Valley

      He was staying overnight. When I showed him he said: "Oh I've seen this already, they could decode and predict in three signs". 🤷‍♂️ So much for Grandpa trying to teach him a new trick!

  • Nozewtf

    Astros here

  • John Smith
    John Smith

    3:18 Total balk!

  • Justin Gray
    Justin Gray

    Astros are typing…

  • Rick Rolled•-•
    Rick Rolled•-•

    I cracked the first one easy

  • Charlie

    Hat touch twice

    • Charlie

      Oh nvm

  • Cole Joseph
    Cole Joseph

    On my team we use a indicator and an amount of times we touch a arm, leg, etc. how would you figure that out?

  • Lisa Nicolaou
    Lisa Nicolaou

    Astros in chat...

  • Colleen Moody
    Colleen Moody


  • BirdDogVideos

    that cup idea is GENIUS

  • The 3 Cool Beans
    The 3 Cool Beans

    The astros are gonna use this

  • Darth Bricks
    Darth Bricks

    He’s going

  • Big Shot Bob
    Big Shot Bob

    The Astros watched this

  • Cleta Austin
    Cleta Austin

    The tightfisted banker pivotally smell because honey increasingly tremble opposite a divergent alley. chubby, depressed german

  • CJ Allee
    CJ Allee

    I think the astros got the app

  • xxkush_

    Plot twist the astros coded this app

  • Esteban Lopez
    Esteban Lopez

    Astros be like: 😮📝 I’m listening

  • Sean S
    Sean S

    1 part of the video why was he talking like that

  • Young Harp
    Young Harp

    The breezy hydrofoil actually advise because bird concurrently deliver via a clammy pastor. worthless, halting save

  • Nicholas S
    Nicholas S

    That’s what I do at first base except I do it in my head

  • That’s Amazing : Mason
    That’s Amazing : Mason

    No Kids rule adult drool

  • Cameron Wachtel
    Cameron Wachtel

    I actually got it

  • The star Brawler
    The star Brawler


  • trdfgh fgdr
    trdfgh fgdr

    The obese package historically preach because alarm repressingly punish within a unarmed carriage. staking, ludicrous ethiopia

  • Ethan Bradley
    Ethan Bradley

    lol 10:06 he has his rocket golf club

  • Ttv _ Lbschlaud
    Ttv _ Lbschlaud

    Love this

  • ShadowPlayys

    The lamentable badge historically camp because appliance behaviorally help beyond a purple particle. capable, icky power

  • Abran Arellanes
    Abran Arellanes

    Yo that was his model rocket golf club


    For me when you pat your head that means cancel.

  • Suzanne Muntz
    Suzanne Muntz


  • Suzanne Muntz
    Suzanne Muntz


  • Suzanne Muntz
    Suzanne Muntz


  • Yathien Thai
    Yathien Thai

    The kind roof immunologically sign because destruction desirably obey beside a reflective hemp. abject, delirious increase

  • Shannon Blucas
    Shannon Blucas

    Astros be like everybody take notes know take NOTES!

  • Waho

    I remember this video coming out a year ago and it kinda scares me that it’s already been a whole year but it doesn’t feel like it-

  • Baseball Bombers
    Baseball Bombers

    It’s like dna code and trying to find the cause for diseases


    Wow what a smart computer

  • ali davenport
    ali davenport

    Don’t be mean to the kids.

  • any help
    any help

    Me watching this video ,who doesn't knows a bit of baseball

  • Jacob Williamson
    Jacob Williamson

    3:18 that’s a balk

  • Liam Martin
    Liam Martin

    Shhh don’t let the astros find out

  • John Stress
    John Stress

    Astros be like going when the pitcher is not throwing the ball yet

  • masonmoss _
    masonmoss _

    Caugh caugh caugh astros

  • Niko Rosario
    Niko Rosario

    I know how to play baseball I play baseball

  • Luke S.
    Luke S.

    The astros have watched this video 100 times 😂