KANSAS CITY, Mo. — Members of the Kansas City Chiefs angrily spoke out Sunday against thousands of fans who cheered when quarterback Matt Cassel left a 9-6 loss to the Baltimore Ravens with a head injury.

Cassel has been the focus of frustrated fans for the past couple of years, many of them booing him when he appeared during a celebrity softball game this summer.

"It's 100-percent sickening," Chiefs tackle Eric Winston said. "I've never, ever — and I've been in some rough times on some rough teams — I've never been more embarrassed in my life to play football than at that moment right there. I get emotional about it because these guys, they work their butts off. Matt Cassel hasn't done anything to you people."