Colin Kaepernick and Blaine Gabbert are splitting reps at quarterback evenly for the San Francisco 49ers.

"We are going to split it right down the middle. I think we've got 24 reps today with the ones," Kelly said. "So (Colin Kaepernick) and Blaine (Gabbert) will split it right down the middle with the ones and twos."

Some believe Gabbert enters camp as the more likely starter for the 49ers.

Kaepernick, who underwent offseason surgeries on his right thumb and left knee in January after having left shoulder surgery in November, has a skill set that would seem to be ideal in Kelly's offense. But Gabbert has been more accurate in his career.

For the first time this offseason, Colin Kaepernick has received full medical clearance from his doctor to fully take part in practice.

According to a source, the San Francisco 49ers met with Dr. Peter Millett, who performed Kaepernick's November shoulder surgery, in Vail, Colorado. Millett put Kaepernick through a series of tests, all of which he passed.

The quarterback is expected to be examined by 49ers team doctors on Saturday before the first training camp practice Sunday.

The Detroit Lions will sign Anquan Boldin to a one-year deal.

Boldin and the Lions, who need depth at receiver in the wake of Calvin Johnson's retirement, were finalizing the deal Tuesday.

Detroit had brought Boldin in for a workout last month but did not sign him at the time. 

Boldin, who will turn 36 in October, has been to the Pro Bowl three times.

Tom Gamble has been named assistant general manager of the San Francisco 49ers.

Gamble returned to the 49ers in January of 2015 after spending two seasons with the Philadelphia Eagles working with Chip Kelly.

“Tom is an accomplished talent evaluator who grew up around the game of football,” said 49ers general manager Trent Baalke. “Having spent the last 28 years of his life in the NFL, his wealth of experience has been invaluable to our organization for almost a decade. Tom is a hard-working professional and more importantly a good man. We are excited he will continue to play an integral role in the development of our team.”

Anthony Davis has submitted his necessary paperwork to rejoin the NFL.

Davis retired following the San Francisco 49ers' 2014 season. Davis was limited to just seven starts in 2014 and wanted to let his body heal. 

Davis was the 11th overall pick in 2010 out of Rutgers and has consistently been one of the NFL's better right tackles.

Aaron Lynch has been suspended for the first four regular-season games for violating the NFL Policy and Program for Substances of Abuse.

"While disappointed to hear the news regarding Aaron today, we support and respect the league's decision," 49ers general manager Trent Baalke said in a statement. "We are confident that he will learn from this matter and that he understands what is expected of him moving forward."

Lynch has 12 1/2 sacks and 61 tackles in two seasons with the 49ers.