Source: Melvin Gordon recovers from microfracture surgery | SanDiegoUnionTribune.com The Chargers running back participated in on-field drills Monday. Afterward, he acknowledged he is not yet 100 percent, still working back from a January knee procedure. Sources said that Gordon underwent microfracture surgery and was given a recovery timetable of four to six months.That phrase, microfracture surgery, carries an ominous connotation.While some past cases warrant the...