Umpire vs Referee

All below listed under either creative commons 3.0: Creative https://creativecommons.org/licenses/by-sa/3.0/ or Creative Commons 2.0 https://creativecommons.org/licenses/by/2.0/
Note: All images cropped

Baseball Player: by Googie Man
https://en.wikipedia.org/wiki/Major_League_Baseball#/media/File:Palmeiro_swing2.png

tiddlywinks.png Wikimedia Commons:
CC BY-SA 3.0, https://en.wikipedia.org/w/index.php?curid=33630909

Referees: by Chris Waits: https://www.flickr.com/photos/chriswaits/8371557609/in/photolist-dKLqqa-oALA16-7jkR5Q-4CbKPT-hUMHW-6WM5q8-4YJpCa-6wssrV-fgoE66-fgoB7H-6LwdLr-dnmnmW-9uKfSU-9agBAZ-fgoApg-amGuHv-8rdX-aEcPGj-Uqvmm4-6YM2xp-mq7kJ-k6ohGK-6CieJ3-d81F6G-Bxausn-6YR3NC-6z1qEq-ony2kd-6yWkua-4EeGRX-d8JpLY-6W5T4x-7QXdq2-gmq3y-5ChyEF-obwLjh-6EaVeT-2x8K3L-9nPQ7F-pN7qHs-do7H7P-9jo7ao-bqHZL4-S9TDG4-KfZg8P-67t3i7-d8bBr9-8teWdb-67t3pj-Kdb5CY

Official Yellow Card: by Jason Gulledge
https://en.wikipedia.org/wiki/Referee#/media/File:Matt_Reis_Carlos_Ruiz_yellow_card.jpg


Cricket: by Pulkit Sinha
https://en.wikipedia.org/wiki/Cricket#/media/File:Tendulkar_goes_to_14,000_Test_runs.jpg

Tennis Umpire: by Spicks and Specks
https://commons.wikimedia.org/wiki/File:Tennis_umpire.jpg

Hockey Goal: by Rick Dikeman
https://en.wikipedia.org/wiki/Goal_(sport)#/media/File:Hockey_goal_cmd_2004.jpg

Kickball: by Tulane Public Relations
https://en.wikipedia.org/wiki/Kickball#/media/File:Upward_Bound_(3654408771).jpg

Basketball Net: by Austin Bjornholt
https://en.wikipedia.org/wiki/Basketball#/media/File:Basketball_Goal.jpg

Association Football (soccer): by Rdikeman
https://en.wikipedia.org/wiki/Association_football#/media/File:Football_iu_1996.jpg

Referee (Dean Morton): by Rick Dikeman
https://en.wikipedia.org/wiki/Official_(ice_hockey)#/media/File:Referee_hockey_ahl_2004.jpg