Grade: 3
Tentatively diagnosed as Patella Femoral Syndrome (knee cap not properly centered). It's possible to address this with physical therapy. First specialist visit is 8/26.
First flare-up (from a track workout) resulted in hobbling for 3 days. Walking and cycling do not seem to affect this too much.
Physical therapy to strengthen hips and quads, and substantial time off from running. Only minor issues riding a bike during the recovery period.