While concerns about rim protection and rebounding dominated offseason discussions about Spurs weaknesses, San Antonio’s potential lack of shooting flew under the radar. Gregg Popovich conceded that the team will likely take fewer three-pointers this year, which is not surprising considering the personnel they have. Unfortunately, that’s not the only concern. Marco Belinelli is gone and Tony Parker will likely regress from a career year from outside, which means the team’s three-point …