Sports jerseys typically display the name of a team or player, or the player's number. The vinyl lettering is bonded with an adhesive. There are different household remedies for removing this glue from clothing and fabrics. Each one can effectively dissolve the vinyl adhesive and loosen it for removal. You have the option of using common ingredients or commercial products, but both will accomplish the task.
Scrape off as much of the vinyl adhesive as possible using a dull, flat edge, such as a credit card or plastic scraper.
Launder the jersey in the hottest setting that is safe for the fabric; check the label for the water temperature. Heat and water often dissolve a lot of mild adhesives.
Heat 1 cup of white vinegar, but do not bring it to a boil. Carefully pour it into a plastic spray bottle, and spray enough to saturate the vinyl adhesive.
Wait 10-15 minutes, then wipe the adhesive with a fresh cloth. Loosen it until the residue lifts cleanly from the jersey.
Use a commercial adhesive solvent, if the previous steps don't work or if you are in a hurry. You can buy a commercial adhesive solvent at a home improvement store or supermarket. This water-based solution safely dissolves glue, adhesives and virtually any sticky substance on fabrics, as well as several other common surfaces.
Apply the solvent according to the manufacturer's directions. Allow it to soak the adhesive for the time indicated, then wipe the jersey clean with a new cloth.