Colin Kaepernick making strong first impression with 49ers coaches

It's anonymous, but positive comments are certainly a plus.

The San Francisco 49ers open OTAs on Tuesday, and while Colin Kaepernick is still not fully cleared to practice, he is apparently making a solid impression. ESPN reporter Bob Holtzman spoke with one of the 49ers coaches recently, and the coach had plenty of praise.

"Works his butt off in rehab, great with the coaches, learning the offense quickly, I like him a lot."

Kaepernick is throwing the football again, but he has not been fully cleared for practice. Trent Baalke said he was doing throwing as part of his rehab process. Matt Barrows reported on Monday that he has full range of motion again, and was in Vail, Colorado for a checkup…