Harvin's migraine a headache for Vikings

The Minnesota Vikings could be without NFL offensive rookie of the year Percy Harvin for Sunday's NFC conference championship game at New Orleans.

Harvin, who has served as a wide receiver and kickoff returner, missed his second straight practice Friday because of migraine headaches.

It's an ailment Harvin has dealt with most of his life, and one which cost him one game this season.

Vikings coach Brad Childress said the situation was "less than ideal" and said Harvin might not be able to fly with the team to New Orleans on Saturday.

However, the coach also noted Harvin has played before while battling the problem.

The Vikings did get some good news on Friday, as defensive linemen Ray Edwards and Kevin Williams returned to practice after being sidelined for two days by knee injuries.

"We'll see how they bounce back" Saturday, Childress said. "That's always the litmus test."