Help! Mystery Part on Ground

[Used4310]

I found a mystery part while walking a tractor path after doing some brush hogging yesterday. I have a 4310 and an old brush hog whose brand is long faded. There is a small chance it is from something else but very likely it is one of them. The PTO was not running while I passed this section yesterday, which has me worried it is from the 4310. I am not that experienced with tearing down the tractor, so don't recognize the part. I did a quick inspection and nothing jumps out at me as wrong.

Seems like it was about 2" diameter, about 1/16"-1/32" thick, and has small castellations on one side.
The part will hold a bend so I don't think it is spring steel but not sure if after going through whatever happened it would maintain that property anyway.

 

[flyerdan]

That looks like a bearing race retainer, or part of one. I'd check the brush hog and see if any spindles are about to come apart.

 

[joecdeere]

almost looks like a ball bearing cage, double check the tail wheel on the cutter and be sure you don't have a bearing that's come apart

 

[Used4310]

Man you guys are fast. You were on the money. On closer inspection it was the bearing on the tail wheel luckily, not the spindle. Thanks!