Kontos (elbow) was activated from the disabled list Tuesday, Alex Pavlovic of CSN Bay Area reports.
After three rehab appearances at the end of last week, the Giants felt confident enough to activate Kontos off the DL. They may choose to ease the 30-year-old back into action, but he should be back to full capacity fairly soon. To make room for him on the active roster, right-hander Clayton Blackburn was optioned to Triple-A Sacramento.