ESPN’s Keith Olbermann eviscerated Penn State in January, labeling the university the “world’s worst” after the NCAA reversed some of the punishment from the Jerry Sandusky scandal. Nittany Lions fans haven’t forgotten about the segment, and on Monday Olbermann sparred with Penn State fans on Twitter after someone sent him a link to a story about a Penn State fundraiser.

Penn State students raised more than $13 million for pediatric cancer research at THON 2015, and Olbermann’s one word response to the tweet sparked a massive argument with his followers.

Many took Olbermann’s tweet to mean that he thought the fundraiser itself was pitiful. Olbermann clarified that he thinks Penn State students are pitiful.

This isn’t the first time Olbermann has feuded with strangers on Twitter. Last August, Olbermann was critical of NASCAR in the wake of Kevin Ward Jr.’s death and berated fans that disagreed with him.

On Tuesday, Olbermann tweeted an apology.

ESPN said in a statement that Olbermann will not host his show for the rest of the week.