Chris Johnson was 3rd in one of the most important stats for a running back yards per carry. Jamaal Charles & Felix Jones beat out Chris Johnson in Yards per carry this year.
Felix had a 5.9 with 116 carries and Jamaal Charles had a 5.9 with a 190 carries. Chris Johnson had a 5.6 with 358 carries. Give both of them that amount of carries I believe their Avg would go down. Plus Felix plays behind Barber plus he has Choice. CJ had 22 carries over 20+ with 7 being over 40+. FJ had 5 carries over 20+ with 4 being over 40+. JC had 9 carries over 20+ with 5 being over 40+.
I would still take the work horse CJ over JC and JC over FJ.