It’s only preseason, and preseason games don’t usually mean a lot. Still, Lauren Betts’s performance against the Atlanta Dream and two-time All-Star Angel Reese was impressive.  Betts has the kind of size and defensive skill set that not many teams were likely to pass on in the draft. Still, as with any other prospect, there were some concerns—mainly how her inside scoring would hold up against WNBA-level defenders who are bigger, stronger, and more talented than most players Betts had to go up against in college, and how far she could go in the W as a traditional big without a reliable 3-point shot.  She took a massive step towards laying the first concern to rest for good in her second preseason outing with the Washington Mystics. Betts went only 2-7 from the field against a Minnesota Lynx team that lacked its usual defense in her debut, but still scored 13 points by sinking nine free throws.…