The Dodgers acquired infielder Yonny Hernández from the Oakland Athletics in exchange for cash. The Dodgers’ 40-man roster is now at 39. In Hernández, the Dodgers add a speedy, versatile switch-hitting infielder. In 55 Major League games (2021 with Texas and 2022 with Arizona), the 24-year-old has a career .198/.293/.228/.521…