“No timetable” for Colin Kaepernick to resume on-field work

Quarterback Colin Kaepernick has been a regular at the 49ers’ offseason workouts, which puts him in line to earn a $400,000 bonus even though a series of offseason surgeries on his left shoulder, right thumb and left kneehave left him without clearance to fully participate in the team’s practices. Kaepernick began doing some throwing in…