Sanders was a schoolteacher when the Patriots signed him in 1974.
The Patriots signed the 31-year-old Allen to a two-year contract two weeks ago.
The Patriots signed him to a rookie contract on May 15, 2013; financial terms were not disclosed.
He was signed by the New England Patriots as a street free agent in 2009.
The Patriots signed Butler to their practice squad on September 21, 2010.
He was signed by the New England Patriots on April 17, 2007.
In 2008 he was signed by the New England Patriots as an unrestricted free agent, but never played any games for the team.
On May 20, 2013, he was signed by the New England Patriots.
In 2008 he made the team's final cut but was released after the Patriots signed wide receiver Maurice Price.
In November 1993, he was signed by the New England Patriots.