A reserve role for Jackson wouldn’t inconvenience his development. He could see more reps Thursday than Griffin or Woodrum, and how long he plays might not even matter as much as whom he plays against. Say he enters the game early in the second quarter and plays through the third. Depending on the Bears’ substitution patterns, Jackson could see a mix of first-, second- and third-string talent, all trying to execute a defense that should be about as exotic as, well, Northeast Ohio. To be sure, there are steeper learning curves in professional football.