Alexander, 26, was originally drafted out of West Virginia by the Milwaukee Bucks in the first round (eighth overall) of the 2008 NBA Draft.
He holds NBA career averages of 4.2 points and 1.8 rebounds in 67 games over three seasons with the Milwaukee Bucks, Chicago Bulls and New Orleans Hornets.
Alexander, 26, most recently played in Russia with Krasnie Krilya in 2011-12, averaging 8.7 points and 3.8 rebounds in six Russian League games and 8.4 points and 4.0 rebounds in nine VTB United League contests.
Prior to playing overseas, Alexander played two seasons in the D-League including 2010-11 when he earned First Team All-NBA D-League honors with the Texas Legends.
He will wear No. 25.