Eugene - Olympic 800m champion and world record-holder David Rudisha pulled out of this weekend's Prefontaine Classic Diamond League athletics meeting Thursday with a knee injury, organizers said.
An MRI scan performed on Wednesday in Eugene, Oregon revealed the injury, which Rudisha's manager James Templeton told organizers was to the Kenyan athlete's right knee.
"The scan showed bruising of the bone and underlying ligaments," meet organizers said in a statement. "Efforts today(Thursday) to test out the knee during a light workout did not go well, and Rudisha has had to withdraw from the Prefontaine Classic 800m."
Rudisha won the 800m at the Diamond League meeting in New York on Saturday in 1:45.14.
He put the unspectacular time down to the rainy weather, and said he was less concerned this season with chasing his world record of 1:40.91 than with defending his world title when Moscow hosts the World Championships on August 10-18.