You have gotten your hands on your favorite team's NFL jersey. Let's say you are a Broncos fan and you have gotten a jersey with the No. 30 on it. As a lifetime fan of the team, you couldn't be happier because No. 30 was worn by running back Terrell Davis. As any Broncos fan will tell you, it was the great running of Davis that was the key to the Broncos' back-to-back Super Bowl victories in the 1997 and 1998 seasons. In 2009, safety David Bruton has that number, but you want to recall the glory days and put Davis' name on the jersey (or some other player's, for that matter).
Go to your local sporting goods store and get a name patch made for your jersey. Not just any name patch will do. It has to be in the Broncos' familiar home navy color (for a home jersey) or in white (for the visitors jersey). The name patch is about 18 inches long and 3 inches wide.
Lay out your jersey on a table with the back of the jersey facing the ceiling. Place the name patch over the name that is already in place. Make sure the name patch you have is the right size and it covers the previous name.
Get a long needle and thread to sew the four corners of the new name patch in the correct place. The best kind of sewing needle for sewing through a garment with the thickness of an NFL uniform is called a "sharp." Use a medium to large sharp and thick blue thread to sew the four corners.
Examine the name patch and make sure it sits securely above the rear number of the uniform. There should be no "loose patches" or gaps. Once you are satisfied the four corners are sewn correctly, finish sewing the name patch on to the back of the uniform.
Activate the name patch by ironing it on the back of the uniform. This will "marry" the name patch to the uniform and give it extra security.