CALEB MARTIN WAS SIXER'S SECOND-BEST PICK-UP OF THE OFF-SEASON!

By Jimmy Wein One of the Sixers' most underrated free agent signings of the summer was versatile 3-and-D player Caleb Martin. The veteran winger may not be as big a name as nine-time All-Star Paul George, but he's eager to showcase his ability as a versatile role player in a complementary role. “Here’s how you fit in,” Martin said. “That’s how you complete the pieces of the puzzle. “If everyone has the same agenda, averages 20 points, plays the most minutes and makes the most shots, that's not the way to complete a team.” Even though he's only 6-5 years old, the 29-year-old is expected…