Matt Maiocco and Jennifer Lee Chan break down the 49ers' first preseason game against the Chiefs, including how Trey Lance performed in his first appearance as a 49ers quarterback, what the rushing attack looked like and if San Francisco’s youthful secondary held up against the Chiefs offense.(1:14) 49ers fall to Chiefs in first preseason game  (7:13) How important are the joint practices with the Chargers? (13:20) Breaking down the 49ers' youthful secondary (18:50) Does the secondary have enough depth? (23:02) 49ers sign Mychal Kendricks  (28:40) Are the 49ers set at wide receiver? See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.