"He's done well in his reps that he's had in the game and in practice," Fangio said, via the San Francisco Chronicle. "Particularly the last two or three weeks, he's played much better."
Asomugha has allowed only one catch for 5 yards in 39 pass-coverage snaps this preseason, according to Pro Football Focus. Quarterbacks have a 39.6 passer rating -- albeit on a very limited sample size -- when targeting Asomugha.
As it stands now, Fangio believes Asomugha still is playing at a high enough level "to be a major part" of the defense.