Not counting his record on Tuesday nights, Johnny Walker is a perfect 3-0 in the UFC proper so far, and has needed just under three minutes of cage time to get it done. He has been very, very impressive. And at 26 years old, coming off his flying knee aerial show against Misha Cirkunov, he represents the new blood at light heavyweight coming up to eventually confront Jon Jones, the re-established overlord of the division. At Walker’s current trajectory — fighting every month or so, give or take — he should be ready to face Jones by no later than April.