Each Monday throughout the NBA season, ESPN Insider will investigate the latest trends in the NBA. Basketball Prospectus' Kevin Pelton is keeping an eye on all the numbers and will have a first look at how players, teams and the league as a whole are evolving.
Trending player: Rajon Rondo's declining shooting
As the Celtics prepare for the playoffs, their biggest concern has to be the performance of their point guard. Rajon Rondo, so crucial to Boston's offense, has struggled in March, contributing to a 5-5 stretch over the last 10 games. It is difficult to overstate just how much Rondo's shooting has been off lately. In terms of five-game averages, every combination of Rondo's past eight games has been worse -- often substantially so -- than any stretch over the season's first four and a half months.