KANSAS CITY, Mo. (AP) -Chiefs running back Larry Johnson has belittled his rookie head coach on what appears to be his Twitter account, saying Todd Haley has ``nuthn'' when it comes to NFL-quality credentials.

The remarks were posted several hours after the Chiefs (1-6) were routed at home 37-7 by San Diego.

One tweet read: ``My father got more creditentials than most of these pro coaches.'' That is followed by: ``My father played for the coach from ``rememeber the titans''. Our coach played golf. My father played for redskins briefley. Our coach. Nuthn.''

Haley did not play high school or college football. He attended college on a golf scholarship. He was hired by first-year general manager Scott Pioli to replace the fired Herm Edwards.

A spokesman for the Chiefs said Monday it was not certain if the tweets, posted under the alias of ``Toonicon'' were posted by Johnson. The Kansas City Star reported, however, that Johnson had said the online alias is his and the account includes a link to Johnson's personal Web site.

The final post read: ``Make me regret it. Lmao. U don't stop my checks. Lmao. So 'tweet' away.''

The tweets drew responses, including one that referred to a nightclub incident in which Johnson was accused of spitting in someone's face. Johnson's response include a three-letter homophobic slur.