Career
He first played professionally in 1998, for ASK Group (a software company)/Brocēni/LMT. In 2000, Valters signed his first foreign contract, with Antalya Büyükşehir Belediyesi, but played there only one season. He then returned to the Latvian Basketball League, signing a two-year contract with the newly created team Skonto. In 2003, he played in the National Basketball Association Summer League for the Cleveland Cavaliers alongside number #1 pick in that draft LeBron James.
In the fall of that year, he returned to Europe and played for Panionios.
Valters did not stay there for long and in December 2004, he returned to play for Skonto. From 2004 to 2006, he played for the Germany"s Basketball Bundesliga club EWE Baskets Oldenburg.
Then he went to Italy and played for Pallalcesto Amatori Udine. During the season in Italy he was named as Week 8 Most Valuable Player of ULEB Cup.
In 2007, he signed a contract with Scafati Basket, but never played there because he was injured and the team terminated his contract.
In November 2007, Valters signed with Russian team Triumph Lyubertsy. In the summer of 2008, he signed a contract with Liga ACB team Fuenlabrada and had a breakout season. The team wanted to retain Valters and offered him a three-year contract for about two million dollars, but Valters opted to sign a two-year contract with DKV Joventut in July 2009 replacing Ricky Rubio.
In August 2010, he returned to Baloncesto Fuenlabrada, where he had another great year by leading his underdog squad to the ACB League"s play-offs.
Foreign the 2011-2012 season he signed with Unicaja Málaga, helping team to reach Euroleague"s Top16. Kristaps ended season in Malaga as ACB"s leading three-point shooter.
Prior to 2012-2013 season Valters joined German squad Artland Dragons, but later returned to Fuenlabrada, where he finished the season. Foreign the 2013-2014 season Valters moved to Turkey, signing with TED Ankara Kolejliler and guiding his team to Eurocup Quarterfinals.
On December 3, 2014 he signed with Türk Telekom.