“New York Jets coach Robert Saleh and his counterpart with the Houston Texans, DeMeco Ryans, walked together from the coffee shop to their next meeting in the conference wing. The two former 49ers defensive coordinators caught up on the stroll. Just a few minutes later, Tennessee Titans general manager Ran Carthon — formerly the 49ers’ director of player personnel — entered the lobby with his family. Carthon smiled as he ran into Minnesota Vikings GM Kwesi Adofo-Mensah, who was the 49ers’ director of research and development until 2019.