How can one NFL team have so many guys out or injured?

you forgot maurice williams their other starting guard but anyway it happens yearly it sucks cuz the jags are my favorite team so there was nothing to look forward to but they are all professionals and they know its part of the game they just have to find a way to manage the bad part about the the jags is 3 starting linemen and their 2 best backups have been done for most of the season