When the Bills last played a playoff game, Fred Jackson was 19 years old.  Yeah, this dude’s old.

But his legs are actually sort of young, since at 31 years young he’s still never had a 250-carry season. Tell that to his bones and muscles, though, which continue to bend awkwardly after bad hits.

Jackson was the league’s leading rusher last year when his season ended early after a broken bone in his right leg, yet he still had 934 rushing yards over 10 games. So when he suffered a knee injury today in the second quarter of Buffalo’s game against the Jets — a game in which the Bills were trailing by three touchdowns at the time — Bills fans immediately began to do what they do best: despise their existence.

It’s unclear how serious the injury is, but there’s good news and bad news, as observed by Sal Maiorana of the Democrat and Chronicle. Jackson was up and walking around on the sideline, but the training staff brought out that plastic bag thing. Whenever an important and essential part of the body is in a bag, that’s bad. Then the bag was joined by a towel on Jackson’s head as he headed to the locker room. The always lethal bag and towel combination is the stuff of doom.

Then of course C.J. Spiller immediately had a 56-yard run that ended in the end zone. So yeah, it’s been a slice, Fred.

We’ll update this post as more information becomes available.

UPDATE: Jackson won’t return to the game and he’ll have an MRI tomorrow, according to Jason La Canfora. Yeah, still not looking good.