Richie's Season Crashes And Byrnes
Irishman Byrne has suffered a number of injuries since joining from Dunfermline in a £40,000 deal two years ago, but Dons boss Jimmy Calderwood believes this is the most serious.
He told the Record: "We've been informed Richie will definitely be out for at least four months and then six to eights week after that.
"He was sent for a scan and it showed he has a three-inch tear of the hamstring tendon.
"I'm assuming he won't play again in this campaign."
With summer signing Dan Smith failing to make a mark at Pittodrie, Calderwood will attempt to sign another left-back when the transfer window reopens in January.
Calderwood told the Press & Journal that he is "disappointed" with Smith's performances so far, and he "needs to sort it out quickly."
However, the Aberdeen boss (thankfully) dismissed links with a move for Leeds United's former Celtic liability Stephen Crainey and Swansea defender Steven Watt.
He told the Evening Express: "It is certain we will try to get someone else in, but we aren't after any of the lads who have been mentioned."