Fred Long was a Detroit Stars outfielder in the early 1920s who went on to become a legendary college football coach.  I had never seen a photograph of Long, but recently ran across this in a July 10, 1948, story about Long in the Chicago Defender:

Then I checked this very familiar photograph of the 1920 Detroit Stars, in which several players remain unidentified:

In some books, the middle player in the back row is identified as Charles “Chick” Harper:

I don’t think I have any other photos of Harper, so it’s impossible for me to say.  But that player, to my mind, looks an awful lot like Long:

UPDATE 4:44 p.m.  Here’s a photo of Fred Long in 1918, as a student at Millikin University in his hometown of Decatur, Illinois (from the Chicago Defender Digital Edition, 2010):

UPDATE 12/7/2012 In the comments Badgerhistory links to a fantastic photograph of the Millikin football team in 1916, with Fred Long in the middle of the front row: