When I pulled up the last the garlic mustard, I ran into this thinking it's a part of the old that was taken down last year. But it's a white fleshy root very easy to cut through and I tossed it to the side to check later. Most the mustard garlic's roots were about the thickness of my fingers, but one of them I dug up was about half this size with those elephant-like markings on it, looked very similar, just smaller.
Can this be part of a root from garlic mustard, can they grow this big? Or what other possibilities? There's generally only common daylilies there and a few phlox from the birds that I leave, grape and trumpet vines that I cut and kill off with a herbacide when I see any growing. Everything else I usually dig out.
My foot (size 9) for a comparison:
Edit to add that I found it maybe 4"-6" down and mostly horizontal.