As for Navigato himself, perhaps there are holes in his game that he’s either working feverishly on, or that he can’t fix but they need still need some shortstop any shortstop to log innings at the Triple-A level. If he didn’t have holes in his game, he’d be up here right now, and if he had fewer holes in his game than Navigato, then it would be Sweeney in Toledo we’d be whining about not getting a chance in Detroit.
Maybe we bring Navigato up if/when Trey Sweeney get hurts. As a 26-year-old 20th-rounder who has never been to the majors, they don’t have to be concerned about Navigato’s service time, nor do they have to baby his development in preparation for a major league career. If they have an emergency need for a shortstop in Detroit, they’ll probably just throw him in there; if they never do, they’ll let him play out the string in the bushes, or offer him as a throw-in to complete some deal. Not sure who would want an overripe minor-league lifer, though.
FWIW, I also believe the Tigers might be thinking of Sweeney the same way. He’s not the future of the position for the Tigers, either. I believe some combination of McGonigle and Rainer probably is. Sweeney is simply the best of several suboptimal options in the present.