Eagles add 13 rookie free agents, including Chris Polk

Eschewing any triskaidekaphobic tendencies, the Philadelphia Eagles have announced the addition of 13 new undrafted free agents. They are: WR Elvis Akpla (Montana State); LS Matt Camilli (UTEP); TE Chase Ford (Miami); CB Cliff Harris (Oregon); FB Emil Igwenagu (Massachusetts); WR McKay Jacobson (BYU); WR Damaris Johnson (Tulsa); WR Aaron Pflugrad (Arizona State); RB Chris…