Per Liz Matthews from 710 ESPN Seattle on Twitter earlier today.
Here is the statement by an NFL spokesperson regarding Allen Barbre suspension...
Barbre suspended w/o pay for team's first 4 games of regular season for violating NFL policy on performance enhancing substances.
Barbre is eligible to return to active roster on the day after the team's fourth regular-season game of the 2012 season.— Liz Mathews 710 ESPN (@Liz_Mathews) May 23, 2012
Barbre is eligible to participate in all offseason and preseason practices and games.— Liz Mathews 710 ESPN (@Liz_Mathews) May 23, 2012