Through the Big Three Era, the Celtics have dealt with their share of injuries. The Kevin Garnett knee ailment that robbed them of a chance to defend their title with a full squad in 2009. The Kendrick Perkins torn ACL that may have cost them a second title in 2010. And that Achilles’ tendon injury that prevented Celtics fans from seeing anything close to the real Shaquille O’Neal.

Such setbacks are customary for NBA teams; significant injuries occur all the time. But for the Celtics, the past 16 days have been a medical nightmare. On Tuesday, they lost their third player in that span to a season-ending injury, as Leandro Barbosa was diagnosed with a torn left anterior cruciate ligament.