49ers film room: First-team defense vs. Chiefs starting offense

KANSAS CITY, MO - AUGUST 11: Center Mitch Morse #61 and the Kansas City Chiefs face off against the San Francisco 49ers during the preseason game at Arrowhead Stadium on August 11, 2017 in Kansas City, Missouri. (Photo by Jamie Squire/Getty Images)
KANSAS CITY, MO - AUGUST 11: Center Mitch Morse #61 and the Kansas City Chiefs face off against the San Francisco 49ers during the preseason game at Arrowhead Stadium on August 11, 2017 in Kansas City, Missouri. (Photo by Jamie Squire/Getty Images) /
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49ers Preseason
KANSAS CITY, MO – AUGUST 11: Quarterback Patrick Mahomes #15 of the Kansas City Chiefs is sacked by outside linebacker Aaron Lynch #59 of the San Francisco 49ers during the preseason game at Arrowhead Stadium on August 11, 2017 in Kansas City, Missouri. (Photo by Jamie Squire/Getty Images) /

2nd-and-10 at SF 43

The Chiefs are in 21 personnel, in an unbalanced bunch formation. The 49ers’ defensive ends switch roles, with Tank Carradine lined up in a wide-9 technique against the Chiefs left tackle:

Smith throws the quick screen to fullback Anthony Sherman, who has two blockers in front of him.

However, Carradine and linebacker NaVorro Bowman read the play and come in pursuit:

Carradine reaches the fullback first, and Bowman assists with the tackle after a short gain: