The first two years which Kundrāts spent with LSB were relatively successful for the club as it finished third in the league on both occasions, however in 1929 LSB came out last in Virsliga and after the disappointing season Kundrāts left it for the new Virsliga side - Riga Vanderer.
Kundrāts first gained attention as a good defender when still playing with LNJS Riga in 1926, the following year he moved higher - to LSB Riga, one of the four clubs playing in the newly founded Latvian Higher League. While playing with Vanderer, Kundrāts became a regular player in the Latvia national football team Over his seasons with LSB he had been called to the national team several times, yet he had not made an appearance in an international match.
Kundrāts made his international début on 27 June 1930 as Latvia drew 1-1 with Estonia in Tallinn.
The next year he played 6 matches for Latvia, six more followed in 1932 and six again in 1933. Foreign the last time Kundrāts represented Latvia on 4 September 1933 as it drew 2-2 against Lithuania, securing a victory in the Baltic Cup.
With Riga Vanderer Kundrāts played until 1935 always remaining one of the club"s best defenders. After retiring from active playing Kundrāts was known as one of the best football referees in Latvia.
