When did they switch jerseys to heat pressed letters and numbers

VEVOR 11 in 1 Heat Press, 15X12 Inch Multifunctional Clamshell Printer, 800W Digital Dual-Tube Heat Press Transfer Machine, 360°Swing Away Sublimation Machine for T-Shirt Hat Cap Mug Plate Pen Shoes

3 Ways to Screen Print Numbers on Jerseys

5 Reasons to Use Heat Press Numbers & Letters - Stahls' Blog

Has anyone had any success removing heat-pressed letters and numbers off of a Nike jersey? : r/baseballunis

Screen Printing vs Heat Transfer

Has anyone had any success removing heat-pressed letters and numbers off of a Nike jersey? : r/baseballunis

How to Print Team Uniforms - Ted Stahl's Blog

Displaying the Registration Number and Validation Decals

1 For Heat Transfer Materials Online, Homepage