Here's what I heard last night while I was sipping Mint Juleps at the Brass Rail from one of the bar maids...
Last night, that guy from that science thing was brought in by Howard Hawks to use Osborne's sperm to concoct a supreme abomination of a clone that would incubated by your mom's nail lady.
But she said the frozen sperm Hawks was told was in the Target sack in his freezer was actually Pat Ricketts' (long story). So they had to extract manually. But apparently, as potent as The Doctor still is, they just couldn't get a good sample. During the "procedure," Tom mentions that it's his divine will for Tressel to get the gig anyway. But now Tressel's missing. So thinking they could actually get a decent cloning from merely the DNA on a Tressel-hair, they raid his sweater vault (the password to which is Woody Hayes birthdate...obv), but, *gasp* - All gone!
So the science guy is like, "I do have this time machine thing laying around." But Osborne, as we all know it, doesn't really go in for time travel. So they sent Pat Ricketts back in time to 2005 to collect a sample, believing this to be the moment in time in which Jim's midi-chlorian count to be the highest. Tressel sees Pat coming through the portal and he's like, "You're here to get a DNA sample, aren't you...I knew this would happen." And so he like, wrestles with Pat for a long time, and finally sends him back to the future.
The rest of the story plays out in obvious fashion; no need to stress my carpal tunnel any further typing it out. And that's how Pat Ricketts becomes the next head coach at The University of Nebraska.