[ESPN.com] Chiefs running back Larry Johnson has belittled his rookie head coach on his Twitter account, saying Todd Haley has “nuthn” when it comes to NFL-quality credentials.

The remarks were posted several hours after the Chiefs 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.

“I talked to Larry about it and he was focusing more on pumping up his father than anything else,” Johnson’s agent Peter Schaffer said. “He wasn’t trying to downgrade anyone … yes, everyone is frustrated after a loss like this but I wouldn’t put too much into it.”

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.

Johnson’s account has since been made private.