Davis' son, Mark, said Allen's return "meant a lot to my mom." He also said Allen "was the absolute true Raider."
The hostility between Allen and Al Davis simmered for almost three decades. Allen spent 11 seasons with the Los Angeles Raiders from 1982-92 and saw his role diminish in his final years with the franchise. At one point, Davis called him a "cancer" on the team.
"Throughout the annals of the Raiders history, the L.A. chapter was very unique," Davis said. "We had a lot of great players come through there. You think of the Howie Longs, the Branches, but Marcus was the leader of that whole group. He was the absolute true Raider. There are very few football players I've seen like him, that worked that hard."
Davis declined to discuss further details publicly, calling it a private family matter.
The root of the Allen-Davis dispute remains a mystery. Some believe Davis was upset because Allen might have wanted more carries and more money. Or that Allen had become a bigger star than Davis in Los Angeles.
Over Allen's tenure, Davis brought in Bo Jackson, Roger Craig and Eric Dickerson among other running backs to split carries. Allen rushed for 1,759 yards in 1985 and never ran for more than 831 yards in his final seven seasons in Los Angeles.
Allen said in a 1992 interview on "Monday Night Football" that Davis "told me he was going to get me." In his 2010 documentary, "Straight Outta L.A.," longtime Raiders fan and rapper Ice Cube asked Davis if Allen was a true Raider.
Davis replied that Allen was "at one point." Asked what fractured their relationship, Davis said: "I'm not going to tell you. It's a deeper story than you even dream, that I was well aware of, and I just got a certain approach to life."
Copyright 2012 by The Associated Press