I understand the desire to include the logo of one’s sports team of choice in the place of letters that are part of an encouragement to that team.
This only works, however, if the logo is not in fact a different letter of the alphabet than the letter it replaces.
For example, if a team’s logo was, say a stylised hockey puck, that could be used to replace the “O” in “Go [Team Name] Go!”
There’s just something unsettling about seeing the letter “O” replaced by a logo that is essentially a stylised letter “C” with a letter “H” inside it.