Jamaal Charles passed tests Tuesday

— -- KANSAS CITY, Mo. -- Although Jamaal Charles showed no signs of a concussion when he was checked after a helmet-to-helmet hit he took from former teammate Brandon Flowers on Sunday, the running back was placed in the concussion protocol this week.

Kansas City Chiefs trainer Rick Burkholder said Wednesday that Charles was placed in the protocol on Tuesday and passed all the tests. Charles will practice Wednesday, but the team will continue to monitor his symptoms.

Burkholder said Wednesday that he checked Charles after the hit and that the running back showed no signs of a concussion, although Charles said in an ESPN Radio interview Tuesday that he wasn't checked for a concussion Sunday.

Shortly after the Chiefs' 23-20 victory over the Chargers, Charles said the hit he took was no big deal. But he changed his story during an interview Tuesday with The Dan Le Batard Show on ESPN Radio.

"It definitely hurt," Charles said. "A couple plays later, I just [saw] this light buzz around my eyes and I was trying to catch 'em. But I was like, 'Let's get the ball and run again.'"

The hit happened on Charles' touchdown run in the second quarter. He went on to describe other symptoms that could be consistent with those of a concussion. He said he had flashbacks to scenes from his childhood. But he indicated he was never checked for a concussion because, he said, he didn't have one. Charles finished the game.

"I didn't have a concussion," he said. "It was definitely a hit that shocked me. I didn't think I had to go through the concussion protocol and all that because I didn't want to go through that again. That's what happened in the playoffs. I was definitely fine. I think I came out pretty good.

"I could definitely play through stuff like that. It wasn't a concussion. If it was a concussion, I wouldn't remember the plays or remember none of my teammates' names or remember what sideline to go to. I definitely remember everything. It was just a huge hit."

Charles was removed in the first quarter of last year's playoff game against Indianapolis after taking a hit to the head. He didn't return. Charles later insisted he didn't have a concussion.

Flowers suffered a concussion on the hit that makes it virtually certain he won't play Thursday night against the Broncos.

ESPN NFL Insider Ed Werder contributed to this report.