In the first half against the Bills on Sunday, Colin Kaepernick completed 8 of 11 passes for 135 yards and a touchdown.
In the second half, he went 5-for-18 for 52 yards.
"I think I saw what I probably expected ... overall (pause), what I would say is, after looking at the whole game, what continues to show is that there's no real rhythm and timing to his play," Greg Cosell explained on KNBR 680 on Monday. "So the question becomes, can that be developed? If he can stay in the same system over time, and whether that happens, I guess noone knows the answer to that at this point.
"He still remains unrefined and somewhat remedial in the disciplines and nuances with all that goes with playing from the pocket."
Kaepernick was sacked three times, and as Chip Kelly noted on Monday: "Sometimes the protection broke down, but he kept some plays alive from that standpoint, did a good job keeping the ball out of harm’s way."
The soon-to-be 29 year old racked up a team-high 66 rushing yards.
"The challenge for both Kelly and Kaepernick is that noone becomes a high-level quarterback in the NFL due to their ability to run or make improvisational plays," Cosell added. "That's not what raises you to a higher level of quarterback. Now, he's on a team where they don't have enough at the wide receiver position to consistently beat good man coverage ... but I don't think there was a significant change in the way Colin played.
"The reality is, the primary read has to show quick for Kaepernick so he can deliver with some sense of timing. If it doesn't show quick, he still remains somewhat limited in his progression-reading abilities. He's still not that guy.
"Obviously, this was not a good performance. For those who still believe he can become a good player, he has to stay in a system for a good amount of time. He's not the kind of quarterback that can change systems."