Boone has two years remaining on his deal, which would pay him a base salary of $2 million in 2014 and $1.2 million in 2015. The fourth-year right guard started all 16 games in each of the last two seasons.
Boone is not the only 49ers player angling for a new contract. Pro Bowl tight end Vernon Davis was also reportedly considering holding out, but he reported to camp Wednesday. On July 14, San Francisco announced a two-year extension with left tackle Joe Staley that would keep him under contract through 2019.
San Francisco can fine Boone $30,000 for every day of camp he misses.
- Alex Hampl