The Seattle Seahawks created some of the biggest drama in the NFL Thursday -- at least for their fans and Vikings fans -- when they announced that wide receiver Percy Harvin was being placed on the Physically Unable to Perform list.

By days's end, the news was that Harvin had suffered a hip injury during a workout last week, according to an NFL.com report, and that he will seek a second opinion about whether surgery is needed.

If he needs surgery, Harvin would likely be out for the season, according to CBSsports.com.

Here's that report.

Here's the NFL.com report, in which coach Pete Carroll says: "We're going to take a real good look at it and get second opinions and all that kind of stuff, to do the right thing. It's really early in camp, we got plenty of time to get this thing worked out, so we're being very careful."

So much for the "slam dunk," the words of Seattle's general manager, when the team traded three draft choices -- including its first-round pick -- to the Vikings in March for Harvin, who had trouble staying on the field (both for games and practice) when he played for Minnesota.

Looking back on much of the national reporting after the deal, it was thought that Harvin's acquisition would be a key piece of the Seahawks being able to compete for the Super Bowl. One report, from a Sports Illustrated blog, was headlined: "Percy Harvin trade a coup for Seattle ... and a huge gamble by Vikings."

After trading for Harvin, the Seahawks signed him to a six-year contract worth $67 million, which includes $25.5 million in guaranteed money, according to the CBSsports.com report.

Needless to say, this is one that Vikings fans will follow almost as closely as news of their favorite team.