Percy Harvin will undergo hip surgery.

It is unclear how long Harvin will be out, but early estimations put the number at three to four months. Harvin would not be able to return until November under that timeframe.

The Seattle Seahawks acquired Harvin in the offseason in exchange for a first-round and seventh-round pick in 2013 and a third-round pick in 2014. Harvin also signed a six-year, $67 million extension with $25 million guaranteed.

Sidney Rice has left for a non-surgical procedure on his knee that is not allowed in the United States.

“He’s actually in Switzerland,” Pete Carroll said Tuesday.

Rice is likely undergoing Regenokine, a blood-manipulation treatment.

Percy Harvin has often missed practices with various ailments throughout his NFL career and is currently seeking a second opinion on his injured hip.

"Guys around here trust [Harvin] and believe in him," Sidney Rice said. "It's nothing like coming out here and taking days off and doing his own thing. I don’t think he’s that type of person. You get that perception from people that don’t really know what's going on, and they just hear stuff and they just create their own [impression]." 

Jason Phillips will miss the entire 2013 season for the Philadelphia Eagles with a torn ACL in his right knee.

Phillips signed with the Eagles in March at linebacker.

Robert Griffin III will wear a brace on his surgically repaired right knee during the entire 2013 season.

“I don’t think I’m mindful of it,” Griffin said. “I don’t really worry about my leg any more. I just play football. That’s a sign that you’re getting ready. Consistently I forget my brace, like I did on the first day [of camp] and everybody made a big deal out of that. But I feel great. It’s just about Coach wanting to be real cautious with me. And that’s understandable. So I’m just taking it that way and I feel good in seven-on-seven.”

Blaine Gabbert was carted off the practice field on Monday with a sprained ankle.

Gabbert injured the ankle during 11-on-11 drills and will be evaluated over the next few days.

Chad Henne will have an opportunity to emerge as the starting quarterback of the Jacksonville Jaguars in Gabbert's absence.

Turk McBride suffered a ruptured Achilles tendon, which will force him to miss the entire 2013 season.

The Chicago Bears were hoping McBride would become a nickel specialist on the defensive line.

Dan Koppen was carted off the field during Sunday's practice with a torn ACL.

Koppen's season would almost assuredly be over and it could be career-ending.

Koppen was signed last month after J.D. Walton was ruled out for the season.

Dennis Pitta dislocated his hip during practice on Saturday.

Pitta will miss the entire 2013 season for the Baltimore Ravens.

Pitta collided with safety James Ihedigo in the back of the end zone when trying to catch a pass from Joe Flacco.

Jeremy Maclin tore his ACL during training camp on Saturday.

An MRI confirmed the tear, which occurred while Maclin was doing 7-on-7 drills.

Maclin stayed on the ground for several minutes and was removed from the field on a cart.