It's called the pound sign b/c the symbol comes from the abbreviation for weight, lb. it was common for writers to cross the letters at the top with a line (similar to a T). The more you know...
TicTacToe Twitter sign!
1 CB Vernon Hargreaves Florida 5-10 204
2 DT Austin Johnson Penn State 6-4 314
3 SS Jeremy Cash Duke 6-0 212
4 LB Jaylon Smith Notre Dame 6-2 223
6 WR Moritz Boehringer Germany 6-4 227
7 OT Brandon Shell South Carolina 6-5 324
7 RB Tre Madden USC 6-0 223
DE David Onyemata, LB Ian Seau, FS Jordan Lomax, CB DeAndre Elliott,
QB Jeff Driskel, TE David Morgan, OG Spencer Drango, OC Mike Matthews
2015 MNF Executive Champion!