Vojtech Kloz played just one season in the Ontario Hockey League. Kloz was a Kingston Frontenac in 2003-04. He played 62 games and was definitely a stay-at-home defenseman getting only three assists over the season.
Kloz returned to his native Czech Republic in 2004-05 and played pro in that country at various levels until midway through last season when he made the switch to the Slovak Extraliga and HK 36 Skalica. Vojtech played a total of 39 games at the highest level in the Czech Republic, the Extraliga.
For a reference, the IIHF ranks the Czech Extraliga third in Europe while the Slovak Extraliga is fifth.
Michael Kolarz played three seasons in the Ontario Hockey League from 2004-05 to 2006-07, all with the Kingston Frontenacs. Good enough to earn a spot on Team Czech Republic at the 2007 IIHF World Junior Hockey Tournament but not good enough to be drafted by an NHL club.
Kolarz played a partial season in the Central Hockey League after graduation from the Ontario Hockey League but has since mostly toiled in the Czech Extraliga 2. Last season was his first with MsHK Zilina of the Slovak Extraliga and he is back with the team for the 2010-11 season.
The Slovak Extraliga consists of 13 teams throughout the country of Slovakia. This past season, 2009-10, HK 36 Skalica finished sixth and MsHK Zilina finished tenth.