NEW YORK –  Kelvin Gastelum says it’s Darren Till or bust at UFC 244. In the midst of fight week, a sliver of doubt was cast over Saturday’s middleweight co-headliner when news broke that Till’s (17-2-1 MMA, 5-2-1 UFC) trip stateside for the showdown with Gastelum (15-4 MMA, 10-4 UFC) was delayed because of a visa issue. UFC officials released a statement confirming Till would not attend Wednesday’s open workouts or Thursday’s media day. Almost simultaneously, a report surfaced that Jared Cannonier (13-4 MMA, 6-4 UFC) was training and prepared to step in as a backup if needed. Related UFC 244 breakdown: Will Kelvin Gastelum spoil Darren Till's move to middleweight? Video: 'UFC 244 Countdown' for Kelvin Gastelum vs