The progressive group Americans United for Change is launching a campaign against Major League Baseball (MLB), pressuring the group to cut its ties to right-wing pundit Glenn Beck due to his history of controversial statements.

Beck recently left his high-profile spot as a host on Fox News to launch his own online network, GBTV. This spring, MLB Advanced Media, the interactive arm of the MLB, teamed up with Beck and agreed to provide him with a streaming video platform. Along with Beck's show, MLB Advanced Media streams more traditional sports fare, such as baseball gamesand March Madness.

On Thursday, Americans United for Change is launching the website Strike Out Beck, where people can go and sign a petition pressuring the MLB to drop the right-wing host. It will be accompanied by a Facebook ad campaign in big baseball towns -- St. Louis, Detroit, Dallas, San Francisco, Los Angeles, San Francisco, Oakland, Boston, Chicago, Philadelphia, Washington D.C., Baltimore and Milwaukee -- that will encourage people to check out the site and join in.