The Seahawks started training camp with six players on the Preseason PUP list - Chris Clemons (ACL), Percy Harvin (hip), Zach Miller (foot), Greg Scruggs (knee), Tharold Simon (foot), Robert Turbin (foot) and one player on the Non-Football Injury list - Korey Toomer (knee). Clemons and Scruggs were expected, as was Simon, who has battled a foot injury all offseason.
The Preseason PUP is quite different than the regular season PUP and really means very little. Essentially, if you are going to be placed on the regular season PUP list after training camp and the preseason, you must have been on the preseason list first - and this means you cannot have practiced even once with the team.
Because of this, really, anyone that is not a full-go for practice goes onto the Preseason PUP list and stays there until they're ready to practice. This protects the team in the case the injury gets worse or in the case the injury's recovery time pushes into the season. This way, you can be placed on the regular season PUP and not count toward the 53-man roster.
Noteworthy here is: any player can be activated from the Preseason PUP list at anytime before the first week of the season.
Once training camp and the preseason are over, and after roster cutdowns, a player can be placed on the Regular Season PUP list, which means he must sit out at least the first six games. But, we're not to that point yet, so try not to hyperventilate about these guys.
Physically Unable to Perform List
DE Chris Clemons (knee)
WR Percy Harvin (hip)
TE Zach Miller (foot)
DE Greg Scruggs (knee)
CB Tharold Simon (foot)
RB Robert Turbin (foot)
Non-Football Injury List
LB Korey Toomer (knee)
Harvin dealing with hip injury:
Now, all that said, as Ian Rapoport points out, Percy Harvin is seeking a second opinion on a possible "slight hip labrum tear." At this point I'm not panicking because we have very little information, but it's obviously very concerning if he has to have surgery or even if it's something he'll have to deal with during the year. He'll see the specialist early next week, per Rapoport, and I'm guessing we'll know more then.
Pete Carroll confirmed in a press conference that Harvin's injury is in the labrum area and that they're not really sure yet what the plan of action will be. Carroll said that Harvin was playing and cutting just a week ago, felt sore, and had an MRI on his hip - that's when they found the issue.