Toronto Blue Jays third baseman Josh Donaldson has begun strengthening activities on his injured left calf and will begin hitting later this week, assuming he still feels good. Donaldson has been on the disabled list since May 29 and had his rehab shut down late in June after suffering a setback. However, this time around Donaldson really just might be close to returning. The Blue Jays certainly hope so. Slashing a disappointing .234/.333/.423 with only five home runs in 139 at-bats, Toronto nee[...]