Matt Stroup and Nate Grimm look at some big-name September call-ups, including top shortstop prospect Gavin Lux of the Dodgers and Astros outfielder Kyle Tucker — and what to expect from both as they try to carve out playing time on stacked first-place teams. Plus, some good news for fantasy players who waited patiently on Adalberto Mondesi, and why Sean Manaea could be set up for a strong September as well.