Editor’s note: Insider Matt Maiocco will analyze each position group leading up to 49ers training camp.
Quarterback Colin Kaepernick is in Colorado for his final checkup before the start of training camp, according to sources.
The competition between Colin Kaepernick and Blaine Gabbert for the 49ers’ starting job this season has yet to begin.
The 49ers enter training camp in Santa Clara next Saturday without a locked in starting quarterback.
Former 49ers lineman Alex Boone signed a four-year, $26.8 million contract with the Minnesota Vikings this offseason. The 6-foot-7, 330-pounder joined