Is Alexander Gustafsson’s retirement going to stick? What factors give us the best hope of predicting that, and which reasons make the most sense for coming back? Retired UFC and WEC fighter Danny Downes joins MMA Junkie columnist Ben Fowlkes to discuss in this week’s Trading Shots. * * * * Fowlkes: Remember when Alexander Gustafsson said that if he couldn’t beat Anthony Smith , he might have to retire