Darnell McDonald on Twitter: "I was with the Yankees in 2012. I heard about the legend of George Costanza as the Assistant to the Traveling Secretary. I wish I met him then.I
George Costanza | The concept of Launch Angle was first brought to MLB by Yankee front office employee, George Costanza. | By The Hitting Vault | Facebook
![YES Network on Twitter: "On this day in 1996, Derek Jeter and Bernie Williams got some swing tips from George Costanza. A look back on the best Yankees "Seinfeld" cameos: https://t.co/jOCSrDpYR7 https://t.co/Eh7ZKflOsR" / YES Network on Twitter: "On this day in 1996, Derek Jeter and Bernie Williams got some swing tips from George Costanza. A look back on the best Yankees "Seinfeld" cameos: https://t.co/jOCSrDpYR7 https://t.co/Eh7ZKflOsR" /](https://pbs.twimg.com/media/EnYGtseW8AUQ_x6.png)
YES Network on Twitter: "On this day in 1996, Derek Jeter and Bernie Williams got some swing tips from George Costanza. A look back on the best Yankees "Seinfeld" cameos: https://t.co/jOCSrDpYR7 https://t.co/Eh7ZKflOsR" /
![whitesoxdave on Twitter: "Reminder: George Costanza Invented Launch Angle and is a Baseball Revolutionary https://t.co/brs74q19yi https://t.co/2U6vPtRnUC" / Twitter whitesoxdave on Twitter: "Reminder: George Costanza Invented Launch Angle and is a Baseball Revolutionary https://t.co/brs74q19yi https://t.co/2U6vPtRnUC" / Twitter](https://pbs.twimg.com/media/DxM0RSXX4AAMVLx.jpg)
whitesoxdave on Twitter: "Reminder: George Costanza Invented Launch Angle and is a Baseball Revolutionary https://t.co/brs74q19yi https://t.co/2U6vPtRnUC" / Twitter
![Amazon.com: Ata-Boy Seinfeld 'George is Getting Upset' 2.5" x 3.5" Magnet for Refrigerators and Lockers,Black : Home & Kitchen Amazon.com: Ata-Boy Seinfeld 'George is Getting Upset' 2.5" x 3.5" Magnet for Refrigerators and Lockers,Black : Home & Kitchen](https://m.media-amazon.com/images/I/61FJFNlVnUL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Ata-Boy Seinfeld 'George is Getting Upset' 2.5" x 3.5" Magnet for Refrigerators and Lockers,Black : Home & Kitchen
![Bleachers Sports Music & Framing — Jason Alexander Signed George Costanza Seinfeld New York Yankees 8x10 Photo - Beckett BAS COA Framed Bleachers Sports Music & Framing — Jason Alexander Signed George Costanza Seinfeld New York Yankees 8x10 Photo - Beckett BAS COA Framed](https://images.squarespace-cdn.com/content/v1/51c0ae45e4b0c2b46f4a4f63/1680730629124-EGZS1CRRFLTMWY2LWNN1/il_794xN.4800010229_lqz3.jpg?format=300w)