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First, we start with the team's bench warmers.
Since none of these four players have gotten a significant amount of playing time, it's impossible to rank them against each other.
Wesley Johnson has played the most among this group. He has appeared in 12 games this season, posting averages of 2.3 points and 0.8 rebounds a game while shooting 33 percent from the field. Johnson is definitely a talented young player with some potential, but it seems unlikely that he will ever have a larger role with the Phoenix Suns this season unless someone else suffers a major injury.
Kendall Marshall was drafted by the Suns back in June, and many expected him to be the team's future point guard. However, Marshall is currently the third string point guard, and he has appeared in just eight games for a total of 46 minutes. In that time, he has shot 3-11 from the field and has dished out six assists, but has also committed four turnovers.
Luke Zeller is another player who hasn't seen much playing time this season, as Luis Scola and Markieff Morris are both ahead of him in the depth chart. Zeller has appeared in nine games this season and has shot 6-16 from the field.
Finally, there is Diante Garrett. Garrett joined the team just before the season started, but he rarely gets any playing time. He has appeared in just six games for a total of 30 minutes, and he has five points and seven assists in that time.
These players do occasionally get to play, but none will likely see their role with the team increase in 2013. Let's move on to the rotation players.