Chip Kelly and the San Francisco 49ers will begin training camp July 30. That day will begin the process of answering the biggest question on the team: Will Kelly choose Colin Kaepernick or Blaine Gabbert as his starting quarterback?

Kelly will use much if not all of training camp and the preseason to make a decision. However, ESPN.com predicts Kelly will select Gabbert as the starting quarterback for the regular season.

Gabbert started the final eight games after Kaepernick was benched during the 2015 season. He completed 178-of-282 passes for 2,031 yards with 10 touchdowns and seven interceptions. Gabbert participated in all offseason workouts and OTAs during the spring.

Kaepernick endured a miserable season in 2015, completing 144-of-244 passes for 1,615 yards with six touchdowns and five interceptions. Kaepernick, rehabbing from shoulder, knee and thumb surgeries, wasn't fully cleared to practice during the offseason and didn't started fully throwing until the final week of mini-camp.

Many observers say the starting position is Gabbert's to lose during training camp and the preseason. Both quarterbacks are mobile and capable of running Kelly's spread option offense. However, Gabbert was actively participating and learning Kelly's offense during the offseason workout, OTAs and mini-camp while Kaepernick's participation was very limited.

Kelly is saying the competition won't begin until training camp. Kaepernick is likely to be fully cleared to practice when camp begins. He'll have some catching up to do.

-- Geoffrey C. Arnold | @geoffreyCarnold