Because apparently the cleaning crew at his hotel were in his room.
Seriously, he couldn't film in front of a skyline of Cleveland? He couldn't film somewhere at The Q? He's in Cleveland covering the Cavs/Magic series and the best he could do was an empty Cleveland Browns Stadium? Unless you knew he was in Cleveland, and unless you heard him make a quip about seeing Brady Quinn throw a pass, you wouldn't have known Mariotti's location. Not that anyone would have gone looking for him anyway. Just strange.