It’s in the Dickson Baseball Dictionary, which says it got its start in hockey for a play that draws the goalie out of the goal. That source also says it’s “long-established” in football (not sure if that means American football or soccer; I’ve never heard it in reference to American football, but that doesn’t mean much). It made its way into baseball in the 1990s, where it’s mainly used for decoy signs.
Actually in baseball I think you’ll find that fielders try to deke the runner a lot by pretending a throw is coming or not coming, etc.
In American football there’s also “juke”, as for a runner to juke the defender “out of his shoes”.
It’s interesting that m-w.com says “to fake out of position” for both deke and juke, but for deke they give ice hockey as an example and for juke they use “football” which is presumably American football. I haven’t heard “juke” anywhere besides football but then I never watch hockey and I only watch basketball when my younger son is around and there’s a big game on.