The Suns have exercised their 2013/14 option on Markieff Morris' contract, according to Paul Coro of the Arizona Republic (via Twitter). Morris will earn a guaranteed $2.09MM salary for '13/14, with the team holding an additional option for 2014/15.
Morris' is one of two option decisions facing the Suns this month. Wesley Johnson also has a 2013/14 option on the fourth year of his rookie contract, worth $5.42MM. The fact that there's no word yet on Johnson's option suggests to me that perhaps the Suns will turn it down and let the former fourth overall pick unrestricted free agency next summer. The team still has until next Wednesday to make a decision, however.