SANTA CLARA -– Perhaps, the 49ers’ most important position group has been without two starters during the team’s offseason program.
Right guard Alex Boone and right tackle Anthony Davis are not taking part in the 49ers’ organized team activities this offseason.
Boone will not take part in any of the mandatory offseason workouts, a source close to Boone told CSNBayArea.com. Boone is seeking a long-term contract extension. A source close to Davis told CSN Bay Area that he is taking part in his own training regimen during the voluntary portion of the off-season program.
The 49ers are implementing a new system under offensive line coach Chris Foerster, who replaces Mike Solari. The 49ers worked extensively on zone-blocking techniques before their workout on Thursday.
Boone held out from the 49ers’ entire offseason program and training camp last year and got off to a slow start after reporting to camp upon the 49ers converting his scheduled incentives into base salary.
Davis missed most of last season due to shoulder, ankle and hamstring injuries. Davis started just seven games with Jonathan Martin starting the other nine games. The 49ers waived Martin this offseason.
Veteran Erik Pears lined up at right guard and rookie Trent Brown took reps at right tackle in place of Boone and Davis during the 49ers’ practice Thursday. The 49ers are also looking to replace left guard Mike Iupati, who signed with the Arizona Cardinals as a free agent.