Philly Soccer and Sports Illustrated Go Way Back

I was searching "Philadelphia soccer" on Ebay and came across this throwback Philadelphia Atoms jersey. The description revealed some interesting information:

The Philadelphia Atoms were a soccer team based out of Philadelphia that played in the North American Soccer League (NASL). They played from 1973 to 1976, at Veterans Stadium (1973-75) and Franklin Field (1976). The Atoms were founded by Philadelphia construction mogul Thomas McCloskey in 1973 at the urging of Kansas City Chiefs and Dallas Tornado owner Lamar Hunt. Playing a largely American line-up, they won the NASL title in their first year of existence, ironically by defeating Hunt’s Dallas club 2-0. After this championship match, Philadelphia goalkeeper and Delaware Valley native Bob Rigby became the first soccer player to be featured on the cover of Sports Illustrated.