Giving up on Zah Frazier without a single regular-season or training camp practice, and after only a little over one calendar year says the Bears completely fouled up a fifth-round draft pick last year. On the other hand, they have a ready-made replacement in Malik Muhammad and he didsn't disappoint at his first rookie camp practice . Texas defensive back Malik Muhammad (5) celebrates after an interception at the Cotton Bowl. Jerome Miron-Imagn Images | Jerome Miron-Imagn Images Why Ben Johnson believes Al Harris will save Bears secondary with Malik Muhammad The rookie fourth-round pick from Texas stands to benefit from one of the great Bears assets and become the challenger for starters Jaylon Johnson and Tyrique Stevenson at cornerback. That asset, of course, is the wizard of defensive secondary play, secondary coach Al Harris. “Yeah, I think for all of our defensive backs, it’s one of the better situations that you could ask for," coach Ben Johnson said.…