GOODYEAR, Ariz. -- Shin-Soo Choo is leaving camp early in a couple days, but he didn't want to leave Sunday's workout early.

Choo bruised his right knee and had to come off the field after colliding with teammate Grady Sizemore during popup drills at the Player Development Complex. But he returned soon after getting some treatment on the knee. He walked without a limp.

"I think I'm OK," Choo said. "I didn't want to miss practice. I'm going to miss it anyway when I leave on Tuesday."

Choo is leaving to play for Korea in the World Baseball Classic. The Koreans will practice in Hawaii for three days, then head off to Japan, where they'll be in Pool A with China, Chinese Taipei and Japan.

The threat of running into a teammate during a routine drill is pressing enough. The Indians have some concerns about Choo leaving camp and participating in meaningful games, particularly with him just a year and a half removed from Tommy John elbow ligament replacement surgery. For that reason, Choo will only play in the outfield in one of the Koreans' first three games. He'll be eligible to DH in the other two games.

"They want me to take care of my elbow," Choo said.

As for the collision, it didn't affect Sizemore in the least.

"Choo forgot I was a linebacker," he joked.