Gabbert strengthens his grip on the backup job in San Francisco

Earlier this year, noted quarterback whisperer Jim Harbaugh took on perhaps his biggest reclamation project yet when the 49ers traded for a failed top-10 pick who had fallen far out of favor in Jacksonville. Blaine Gabbert, former Jaguar, arrived in San Francisco in March.  Via Matt Maiocco of CSNBayArea.com, Gabbert has emerged through offseason workouts…