Both Gert Bo Jacobsen and Greg Haugen were professionals at what sport?
Gert Bo Jacobsen Gert Bo Jacobsen (born 1961-12-28) is a former WBO welterweight title holder. He is from Oestrup, Denmark. His first 26 fights he was undefeated from 1983 to 1988. His first lost came in October 1988 to Greg Haugen.
Arnold Mühren Arnold Johannes Hyacinthus Mühren (born 2 June 1951 in Volendam, North Holland) is a Dutch football manager and former midfielder. His older brother Gerrie, also a midfield player, won three European Cup titles with Ajax in the early 1970s. Mühren is among the few players to have won all three major UEFA-organised club competitions, the European Cup (1972–73), the Cup Winners' Cup (1986–87) and the UEFA Cup (1980–81). The last of these was won with Ipswich Town, while the other titles were won while playing for Ajax. He is also one of the two Dutch players, together with Danny Blind, to have won all UEFA club competitions and the Intercontinental Cup.