The Leeds United pair have signed long-term contract extensions.
The long-serving Leeds defenders have signed five- and four-year extensions, respectively, having made strong starts to the new campaign.
Cooper's existing contract still had another campaign to run after this one, although Dallas's was fast-approaching expiry.
And there are a handful of others in the same situation as the one in which the Northern Irishman had found himself - notably Mateusz Klich.
Recent reports have suggested that a new deal could indeed be in the pipeline for Klich - and the following Leeds fans certainly hope that's the case...
Klich next— weststand cowboy (@manilvablanco) September 11, 2019
Well deserved that is Klich next now https://t.co/lb6Dn5cv58— Jake Edwards (@JakeEdwardss94) September 11, 2019
Fantastic news...made my day..must tie klich down too ...WAFLL https://t.co/3C4Z7jBCMM— Andrew Martinez (@maartz68) September 11, 2019
This is all kliching into place— Ethan Barraclough (@Exhan1234) September 11, 2019
Just Klich now then— Bryn Johnson (@BrynLufc) September 11, 2019
Midfielder Klich has made eight 'key passes' (ones which lead to an attempt on goal) this season, more than any other Championship player.
His senior teammates Pablo Hernandez and Gaetano Berardi are also out of contract at the end of this campaign.
Which other Leeds players are in urgent need of new deals?
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