It's a bit hard to tell, but it does look like a grass seed head. And it's absolutely the right time of year for them, my place intermittently looks like a nodding field of green-headed grain as shadier and shadier parts seed out (in Zone 7a/6b border).

Since you just sodded, that would explain the rarity.

...but that grass could be a weed in your lawn. There are lots of grassy type weeds. If you don't have an entire lawn covered with seed heads all at the same time, I'd bet that one was a weed.

Rare seedheads aren't at all unusual for beginning of second year sod, so I wouldn't get this person too worked up at this point. :-) Even my well-treated KBG only seeds out in patches and, in some areas, does look like the above shot, with only a few random seed heads in a pretty big area.