Grade: 3
Sacroiliac sprain, worst running injury I've ever had.
Chiropractor has helped enormously so far, still a long way to go as of 4/30.
Had to scrap leg 2 of the Speedy Goat relay. Someone else ran for me, so I can't vouch for the splits.
Aside from lax warmups, cooldowns and cross-training, I think the main cause was an evening in early April when I went for a run at night and my headlamp gave out. I kept up my pace and made at least one bad step - I expected to hit ground and kept going a few more inches. I may have done this multiple times.
I think this would have healed on its own but I think the chiropractor moved up the clock by a few weeks.