The 31-year-old joins the Revolution on a free transfer from 2. Bundesliga side Karlsruher.
“We believe Flo will be a solid addition to our defensive corps and he adds versatility and depth to that group,” Revolution General Manager Michael Burns said.
“We were pleased with how Flo adapted to MLS’ style of play and how he interacted with our players when we was with us in Tucson during preseason.”
