Trading Marlin Mack for TE and LB?

A team in my 10 team full PPR redraft league wants me to trade my Marlin Mack and receive their Jimmy Graham and Jaylon Smith. I have Trey Burton and Ben Watson for TEs, and I have David Johnson, Kenyan Drake, and James Conner for RBs and Dee Ford for LB. Is this a fair value for Mack?