She is the co-editor, with Jerry Wemple, of Common Wealth: Contemporary Poets on Pennsylvania (2005) and two children's books--A Crossing of Zebras: Animal Packs in Poetry (2008) and Rules of the Game: Baseball Poems (2009)--and two forthcoming--A Man Named Branch: The True Story of Baseball's Great Experimentand Inside Out: Poems on Writing Poems. Working Poet: 75 Writing Exercises. Her memoir essay, "Going Exactly Where We Want to Go," is included in Fast Break to Line Break: Poets on the Art of Basketball, edited by Todd Davis.

Marjorie studied with A. R. Ammons, Robert Morgan, Phyllis Janowitz, and Ken McClane at Cornell, where she received her MFA in poetry in 1989. Maddox received an MA in English at the University of Louisville and a BA in Literature at Wheaton College. She lives with her husband and two children in Williamsport, PA, birthplace of Little League and home of the Little League World Series. She is the great grandniece of baseball legend Branch Rickey, the general manager of the Brooklyn Dodgers who helped break the color barrier by signing Jackie Robinson.