Nick Collison has undergone arthroscopic surgery on his knee, according to the Oklahoma City Thunder's official Twitter feed. The team also tweeted that he is expected to miss 4-6 weeks and then return to normal offseason activities. The reported timetable shouldn't have any effect on Collison's availability for the 2014-15 season as he should be ready for the start of training camp barring any setbacks. While the 33-year-old is a solid fixture in the Thunder's rotation, his 2013-14 averages of 4.2 points, 3.6 rebounds, and 1.3 assists do a good job of illustrating his limited fantasy upside.