"Weapons, recon gear, dress casual. We're going to San Diego." Such a huge city under S.H.I.E.L.D.'s jurisdiction was the last place Fury should probably be, but that's where he'd tracked his latest quarry and that's where he had to go. Probably he could have done this alone, but backup was always good and this wasn't something he could ask any of his former agents to risk themselves on.
Alex he could trust. Alex wouldn't question what was going on, was loyal, and could get the job done. Kid or not, he was the best choice to help Nick track down an assassin who was trying to track him down (and getting too fucking close for comfort giving how often he changed locations and how many LMDs were operational out in the world). Time to take care of the problem.