By Erik Horne Staff Writer ehorne@oklahoman.comFriday is the deadline for NBA teams to make a big roster decision. Kyle Singler's contract hasn't loomed large in the way Carmelo Anthony's or Enes Kanter's did on the Thunder payroll, but it's been an annual reminder of how little the 30-year-old swingman has produced in a Thunder uniform.Read more on NewsOK.com