The pair worked together at Bolton Wanderers and Brown believes that Allardyce has the players on side.
In the recent 2-2 draw with Crystal Palace one such example was prevalent when Lee Cattermole clashed heads with Jordon Mutch.
He was left bloody and confused, suffering concussion in the incident.
In the end it was his enforced replacement Fabio Borini who slammed in a wonderful equaliser late on.
But the Sunderland players, as a whole, certainly seem to be playing for Sam Allardyce.
They have no qualms with putting their bodies on the line in order to gain success for their gaffer. One man who knows Allardyce well is Phil Brown. He worked with Big Sam as his assistant for six years at Bolton Wanderers and was offered the same job at Sunderland.
The current Southend United boss was speaking to Sky Sports News this week (02/03/2016) when he had this to say about the players at Sunderland:
"He's got a bunch now that are playing for him. They are playing for Sunderland football club. The previous incumbent (Dick Advocaat) they weren't really playing for the club, they didn't really know what it meant to play for the badge.
"You see Lee Cattermole and you see a number of blood-stained shirts last night which is a sign of commitment. It is a sign that players are putting their bodies on the line for the cause.
"When you see Lee Cattermole do that and then the substitute come on and scores a wondergoal."
It is this sort of commitment that has many a pundit and fan convinced that Sunderland will survive this season.
Allardyce has the survival nous from spells at Bolton Wanderers and West Ham United which should also help them through until the end of the season.