According to ESPN's Adam Schefter initial diagnosis show that Denver Broncos starting linebacker Nate Irving has a sprained MCL, but it's not expected to end his season. Schefter does say that more tests need to be performed before getting a confirmed diagnosis.
Initial diagnosis is that Broncos MLB Nate Irving has a sprained MCL that is not considered season ending, but more testing ahead.— Adam Schefter (@AdamSchefter) November 3, 2014
Schefter did not give a timetable on Irving's eventual return but either way the Broncos will be without Nate Irving for an extended period of time. This is already a banged up linebacker group that is without starting weak-side linebacker Danny Trevathan who has missed all but two games with knee injuries this season.
It will be interesting to see how the Broncos go about replacing Irving in the lineup. Veteran linebacker Steven Johnson is listed as Irving's backup, but he has missed the past two weeks with an ankle injury. Rookie linebacker Lamin Barrow is listed as the third string linebacker, and he did replace Irving in the teams base/three linebacker sets in yesterday's game.
We will keep you updated on Irving's injury when more is released. Lets hope it's more good news.