Hamburg have signed US international striker Bobby Wood from Union Berlin, the "Rothosen" announced in an official statement on Sunday.

The 23-year-old U.S. international moves from second division club Union Berlin to top-flight club Hamburg this summer after inking a four-year contract that binds him until June 2020.

"We are very pleased that we were able to realize this transfer that early," Hamburg's chairman Dietmar Beiersdorfer said. "We are looking forward to a young player, with a lot of potential for development, who has already gathered international experience with the national team."

The striker made overall 89 second-division appearances to mark 23 goals. Wood is in addition since 2013 part of the U.S. national soccer team where he played 23 caps ever since.

"I am delighted to get the chance to play for this great club. The talks with those responsible, in particular coach Bruno Labbadia, were very good. From the beginning I had a good feeling that this is the right move and club for me," new arrival Bobby Wood said.

Hamburg completed the 53rd Bundesliga season the 10th place of the standings.