I couldn't stand to read this whole thread so I'm sorry if this has already been brought up. To preface this, I think there are some good things Jumper does, but he does definitely seem a step behind when covering the RB, TE, etc.
Looking at who we have at middle linebacker (DKjr, Jumper and Bryant), Jumper is the only one of those besides DKjr that has significant playing time, especially playing time in big time games (Oklahoma and VTech). So in a pinch, like on Saturday, why wouldn't you play the 'next man up' with the most playing experience? Colton will get the 1st reps on Saturday, as opposed to 4 other guys (sapp, bates, berry, bryant) with little to no game experience.
But just as Butch said today, they will all get a chance to show what they've got. And (don't jump on me all at once English majors) just like last year between Jumper and DKjr,the better player will win the job. Everyone step away from the ledge.