The USA international has found first team football hard to come by this season and is keen to move on. And with his current contract running out next summer, the Hammers look open to offers.
The Bundesliga side are said to be keen on the player who has struggled under Avram Grant despite being a regular last season under Gianfranco Zola, when he made 27 first team appearances.
Eintracht Frankfurt boss Niko Kovac felt his side could have scored more goals following their 3-0 defeat of Mainz on Saturday.
West Brom manager Alan Pardew refused to fault his players' efforts after a heartbreaking 2-1 loss to Bournemouth that dashed their already slim survival odds.
Cardiff manager Neil Warnock labelled the postponing of his side's clash at Derby as 'scandalous' and a 'disgrace'.