The Bills are not trading a 3rd for Bryce Brown. If the pick for Stevie turns into a 3rd they keep that pick and send a 4th to Philly in 2016 otherwise they send the 4th they get from SF for Stevie to Philly.
Outside of the fumble Brown has played well in the limited amount of time he has received and actually has looked better than any Bills back this year outside of Fred week 1
They traded a 4th round pick for a known player who could easily be their starting RB next year, dont understand all the negativity around that trade. Prob the same ppl that were way too upset about trading a 7th for Tavaris