Ballpark bucket list: How the Chase Sapphire Preferred has helped me travel to 20 MLB stadiums

When 16-year-old me set a goal to visit all 30 Major League Baseball stadiums, I knew it would take time — and money. What I didn’t know was how far one credit card would take me. And how little money I’d actually spend. And no, I’m not talking about a premium travel card loaded with …