Colin Kaepernick (back) practiced in full Thursday, FOX Sports 910 Phoenix reports.

Kaepernick (back) practiced in full Thursday, FOX Sports 910 Phoenix reports.

Analysis:

Kaepernick hasn't missed a start since taking over for Alex Smith in the latter half of the 2012 season, and his activity level Thursday shouldn't threaten his availability heading into Sunday's game in Arizona. In three career nods against the Cardinals, he's completed 53-of-91 passes (58.2 percent) for 838 yards with six touchdowns and one interception en route to a 3-0 record.