Mike Zimmer and Case Keenum walking the thin line between risk and rewardMike Zimmer has a way of cutting right to the chase. He’s been asked about his quarterback situation ad nauseum for weeks, and finally he just laid it out there on Tuesday when asked about Case Keenum’s performance over this six-game winning streak. “The thing I like the most about Case is he’s got big balls,” Zimmer said. “He’s not afraid. He’s going to pull the trigger and he is going to play like that.