Michael Hattley of Touchdown Treasures explains his passion for odd and unusual sports memorabilia — and offers his opinion on why The National should spread its wings to other cities throughout the country.

By Chris Olds | Baseball Editor

You might have missed it a few weeks ago in a sea of Charlie Sheen autograph news.

You see, tonight will be Sheen-Co De Mayo at the ballpark — at least in Lake Elsinore, Calif. — and the bobblehead doll seen here will enter the memorabilia market as a limited number of baseball fans will own one after the game. [Editor's note: I want!]

What else is planned for the big ballpark “holiday”? Click here to find out …