Notebook: Childress confirms Percy Harvin is battling migraines again
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"He's had some," Childress said. "But ... God-willing, he's going to work through this."
Harvin hasn't practiced since July 31, missing 10 days (and counting) while grieving the passing of his grandmother.
But he's also dealing with a recurring and somewhat confounding physical issue that caused him to miss a game and several chunks of practice time during his breakout rookie season in 2009.
Since stress can bring on migraines, it's no surprise the death of a close family member has raised the issue again.
"It's ongoing," Childress said. "From the people at Mayo that are extremely qualified -- there's a Mayo down in Jacksonville. He's seen neurologists. It's just something that continues on.
"The only thing that would be wrong is if we quit trying to find things and throw our hands up in the air. It's kind of an inexact science if you will."
The Vikings break camp here on Thursday and open the preseason on Saturday at St. Louis.
Harvin -- who has participated only in parts of three practices in camp -- remains at home in the Twin Cities and now seems unlikely to rejoin the team before practice resumes Monday in Eden Prairie.
Asked what the team likes about Brown, a seventh-round pick by the Cincinnati Bengals last year, Childress said, "That he's fresh. With eight receivers in here, we're running the legs off some of these guys. We needed somebody that we could get in here."
Brown (6-foot-4, 210 pounds) played collegiately at Utah. He ended the 2009 season on the practice squad with the Bengals, who cut him on July 28 to make room for veteran receiver Terrell Owens.
Darius Reynaud returned to the field for the first time since spraining his left ankle on Wednesday. However, it was unclear how soon the running back/return man would be cleared for full contact.
"Let's see how full-speed he is," Childress said. "He had an ankle sprain -- thank goodness it wasn't a high ankle sprain. ... We'll just see what he can do and if he can protect himself, that's the key."
Reynaud caught some punts and went through individual drills in the afternoon but wasn't on the field for any 11-on-11 drills.
Not dressed for either practice on Tuesday were: left guard Anthony Herrera (back spasms), center John Sullivan (calf), tight end Visanthe Shiancoe (unknown strain), linebacker J Leman (turf toe), tight end Jimmy Kleinsasser (unknown), long snapper Cullen Loeffler (personal), cornerback Cedric Griffin (knee, PUP) and Rice.
• Players took the field in full pads as scheduled for Tuesday's morning practice. But a lightning strike near the practice field forced coaches to rearrange the schedule, finishing special-teams practice inside the fieldhouse and rescheduling the padded, live-contact practice for Tuesday afternoon.
• Childress reiterated no decision has been made on when -- or if -- top draft pick Chris Cook will join the competition at right cornerback. "I wouldn't say strong -- it's a possibility," Childress said. "We want to just let him settle in and play one spot and let him get used to that spot. ... Whether we progress him and say, 'Hey, let's see if he's got an aptitude on that side,' we'll see." A depth chart released on Monday listed Asher Allen, not Lito Sheppard, as the starter.