Bruce Irvin the latest hip injury for Seattle

RENTON, Wash.-- Hip problems seem to be contagious for the Seattle Seahawks.

First was receiver Percy Harvin, who missed most of the 2013 season after undergoing hip surgery in August to repair a torn labrum.

Then it was strong safety Kam Chancellor, who had hip surgery in March. Chancellor, who had played with a labrum issue for more than a year, was at the practice Monday, but did not participate. He expects to return in time for training camp next month.

And Monday it was outside linebacker Bruce Irvin, who had hip surgery after competing in organized team activities last week. No timetable was announced for Irvin's return, but he tweeted he would be back in time for training camp. If that's true, his surgery couldn't be as serious as the surgical procedure for Harvin or Chancellor.

Irvin wrote this tweet Monday afternoon:

But Irvin's absence leaves a hole for the moment at outside linebacker. Malcolm Smith is not practicing right now after undergoing minor ankle surgery. He also is hoping to return for training camp. Smith was wearing a protective boot last week, but he was walking around without the boot at Monday's OTA practice.

Irvin and Smith being out would have given plenty of reps Monday to rookie outside linebacker Kevin Pierre-Louis, a fourth-round pick from Boston College, but he has a mild groin injury and didn't participate in team drills. Linebacker Korey Toomer, who missed the last two seasons with injuries, is getting a long look in OTAs. He also participated in rookie minicamp and played well.

Others who were not at practice Monday included running back Marshawn Lynch and defensive tackle Tony McDaniel.

Lynch, who was in Seattle Saturday for a sponsor event at a mall, has elected not to participate in the voluntary OTAs so far. He also missed the early OTA sessions last year. McDaniel was not at practice because he is moving into a new house.

Cornerback Richard Sherman practiced Monday, but left quickly afterwards because he is closing on a new house.

Defensive tackle Jesse Williams and cornerback Tharold Simon, who did not practice one week ago, participated fully on Monday.

Rookie defensive end Cassius Marsh of UCLA and rookie defensive tackle Andru Pulu of Eastern Washington were not at practice because NFL rules do not allow them to participate while their respective schools (both on the quarter system) are still in session.