A Twitter experiment that went awry has landed a sportswriter for The Washington Post with a one-month suspension.

Mike Wise, a respected Post columnist, was suspended by the newspaper on Tuesday, a day after he posted a fake report on his Twitter account.

"Roethlisberger will get five games, I'm told," Wise wrote on his Twitter feed, @MikeWiseguy, on Monday in a reference to the length of the suspension handed down to Pittsburgh Steelers quarterback Ben Roethlisberger.

In fact, Roethlisberger's penalty for an offseason incident in a Georgia nightclub has not yet been determined.

Wise told the Post that he "tweeted" the made-up report as a social media experiment to to see how widely it would spread in the media, a move he said later was a "horrendous mistake."

"I'm not a journalism ombudsman," Wise told the Post. "And I found that out in a very painful, hard way. I need to take my medicine and move on, and promise everybody this will never happen again."

"I'm paying the price I should for careless, dumb behavior," he said.