William "Bill" Mackrides (born July 8, 1925 in Philadelphia, Pennsylvania

Philadelphia, Pennsylvania

Philadelphia is the largest city in the Commonwealth of Pennsylvania and the county seat of Philadelphia County, with which it is coterminous. The city is located in the Northeastern United States along the Delaware and Schuylkill rivers. It is the fifth-most-populous city in the United States,...

) is a former American football

American football

American football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football. The ball can be advanced by...

 quarterback

Quarterback

Quarterback is a position in American and Canadian football. Quarterbacks are members of the offensive team and line up directly behind the offensive line...

 for the Philadelphia Eagles

Philadelphia Eagles

The Philadelphia Eagles are a professional American football team based in Philadelphia, Pennsylvania. They are members of the East Division of the National Football Conference in the National Football League...

 of the National Football League

National Football League

The National Football League is the highest level of professional American football in the United States, and is considered the top professional American football league in the world. It was formed by eleven teams in 1920 as the American Professional Football Association, with the league changing...

. He helped the Eagles win the 1948 NFL Championship. Mackrides played college football

College football

College football refers to American football played by teams of student athletes fielded by American universities, colleges, and military academies, or Canadian football played by teams of student athletes fielded by Canadian universities...

 for the University of Nevada, Reno

University of Nevada, Reno

The University of Nevada, Reno , is a teaching and research university established in 1874 and located in Reno, Nevada, USA...

.

In his last season in 1953, Mackrides played for the Pittsburgh Steelers and was the last Steeler to wear uniform number 13 in a regular season game until punter Jeremy Kapinos wore that number in 2010.

Mackrides later gained degrees in Education and Psychology. He has since retired and now resides in Delaware County, Pennsylvania nearby to his four children and 12 grandchildren. He also runs a summer day camp in Chester Springs, PA.