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I'm no expert but i don't think that is any kind of Bermuda. It looks more like a different strain of tall fescue. I barrowed this bad pic

The "lawn guy" who told you that was Bermuda should not be allowed anywhere near your yard. I agree with kbinmd, most likely wild type tall fescue, or a similar grassy weed.

I know this is ridiculously late (like a year!), but, in case you haven't had this question answered, the grass you see here is Kentucky 31 Fescue, AKA "Pasture Grass".

VERY common here in the Kansas City area, especially the suburb areas (which used to be pasture land!) When you buy TTTF fescue here in the midwest, you get half K-31. It's ugly, and extremely tough. It's what they use to seed Football fields. Almost indestructible.

I have seen people kill it with boiling water. It's about the only thing that works.

The only way it looks good is if you lawn is 100% K-31, you mow it 4.5" tall, and you're viewing it from 100' away.

My front yard is mostly TTTF, back yard is 50/50 TTTF and K-31. (where the Grand-kids play baseball... Can't kill that stuff!)

Bill