The 38-year-old joins the Red Bulls on a free transfer as his contract with Hamburg expired at the end of last season.
“Frank is a very experienced goalkeeper who will provide a strong presence in between the posts for our club during our quest for a MLS title,” Erik Soler, the Red Bulls’ general manager and sporting director, said in a statement.
“We are thrilled that he has decided to join us in the middle of our campaign and look forward to his contributions for the remainder of the season.”
