Darrell Arthur (right) is headed to Denver. (Stephen Dunn/Getty Images)
Arthur, 25, has spent his entire four-year career in Memphis, posting career averages of 6.7 points and 3.9 rebounds in 18.2 minutes per game. He is on the books for $3.2 million next season and holds a $3.5 million player option for 2014-15.
Koufos, 24, holds career averages of 5.1 points and 4.3 rebounds in 14.4 minutes per game in five seasons with the Jazz and Nuggets. He is on the books for $3 million per year in both 2013-14 and 2014-15.
Arthur (No. 27) and Koufos (No. 23) were both first-round picks in 2008.
Lauvergne, 21, is a native of France currently playing in Serbia.