The move, officially announced by the Suns on Thursday, unites Marcus with identical twin brother Markieff in Phoenix. The Suns on Thursday also traded backup point guard Sebastian Telfair to the Toronto Raptors for center Hamed Haddadi and a second-round pick, league sources told ESPN The Magazine's Chris Broussard.
Only once before in NBA history have twins played for the same team, when Dick and Tom Van Arsdale were together with the Suns in 1976-77.
The Suns sent a 2013 second-round draft pick to Houston to get Marcus Morris, who was the 14th pick in the 2011 draft. Markieff was the 13th pick overall by Phoenix. The twins played together at Kansas.
To make room for Marcus Morris, Phoenix waived forward Luke Zeller.
Information from The Associated Press was used in this report.