49ers' Harbaugh Back to Work After Heart Procedure San Francisco 49ers coach Jim Harbaugh is back at work a day after undergoing a minor procedure for an irregular heartbeat. The reigning NFL Coach of the Year returned to the field to lead San Francisco through Friday's walk-through session, with a full practice scheduled for the afternoon. Harbaugh, who turns 49 on Dec. 23, was away from the team Thursday for his procedure at Stanford Hospital. His NFC West-leading Niners (6-2-1) host the Chicago Bears (7-2) in a key NFC showdown on Monday Night Football.