It won't be official that Alex Boone is a holdout until July 23, when veterans are due to report to 49ers training camp.But there's every indication so far that Boone will be a no-show, and the Niners will begin work toward the 2014 season without their starting right guard.Boone and tight end Vernon Davis both held out during the recent full-squad mimicamp, unhappy with their deals. But since then Davis has indicated he's probably not going to force the issue. It's likely that No. 85 will report on time.Boone, however, is a different story.Boone, a starter the past two seasons, has two years left on his contract that's reported to be worth $2 million this coming season, plus a roster bonus of $200,000; he's due to get $1.2 million in 2015.That contract is an absolute bargain for the 49ers, notes the Sacramento Bee's Matt Barrows, because Boone signed his current deal when he was a backup offensive tackle. But he's started 38 games since then and become another physical presence on an offensive line that ranks as one of the NFL's best. Now Boone's salary ranks below 40 other guards in the league, reported Barrows, creating a huge "disonnect between Boone's salary and his...