Evans discovered a blood clot in his calf after undergoing surgery on his knee earlier this offseason, Justin Verrier of ESPN reports.

Evans was already expected to miss the first portion of the season, but things have become even more complicated with a blood clot involved. It's hard not to make a comparison to Chris Bosh's ongoing blood clot issues in his calf that have stunted his career, but it's still unclear at the moment if the same severity applies to Evans and his situation. Either way, a return date for Evans is unclear.