Lobster For Crab: Hot AC WBMX/Boston morning show Assoc./Producer and Traffic Reporter Francesca Presti is joining iHeartMedia WPOC/Baltimore's Laurie DeYoung Show Dec. 4. "Francesca Presti is a force," says DeYoung. "Fierce Francesca is what comes to mind when I think of her enthusiasm and unique take on life. Baltimore will never be the same." She succeeds Claire Scattergood, who is stepping down to spend more time with her family (CAT 9/14).