Posted by ESPN.com's Mike Sando
Rules governing practice-squad eligibility can be confusing. Players are eligible as long as they:
Have spent fewer than three seasons on a practice squad. As the collective bargaining agreement states, "A player shall be deemed to have served on a Practice Squad in a season if he has passed the club's physical and been a member of the club's Practice Squad for at least three regular season or postseason games during his first two Practice Squad seasons, and for at least one regular season or postseason game during his third Practice Squad season. (A bye week counts as a game provided that the player is not terminated until after the regular season or postseason weekend in question.)"
Have never spent nine or more games in one season on a 45-man game-day roster. Failure to understand this rule creates confusion. Seemingly experienced players sometimes retain eligibility.
The Rams added seventh-round choice Chris Ogbonnaya and 2008 Eagles third-round defensive end Bryan Smith to their practice squad, joining cornerback Cordelius Parks, tight end Eric Butler, linebacker Dominic Douglas, linebacker K.C. Asiodu, defensive end Ian Campbell and receiver Sean Walker.
The 49ers signed seven to their practice squad Sunday. They'll could add an eighth after releasing a player to make room on the 53-man roster for offensive tackle Tony Pashos.