A few pointers:
The odds in the US are called “lines” and are those who take the +/- form. In the US people do search for odds, but in this case they often refer to the UK system, i.e. 3/1, 13/8. The rest of Europe usually refers to the odds as “coefficient” and they take the decimal form 2.10, 3.50 etc.
My recommendation is when you write about odds and expect US visitors, use the UK system (3/1). Also, every sportsbook has the option to convert the odds in your system of choice, you may want to mention that on your website.
And finally, the major US sports (football, basketball) do not have a draw (x) – one of the teams must win the game, so 1×2 system is pretty much non-existent.
Oh, and by the way, in U.S. the host team is the second. For example, the game played in Manchester in Europe would be “Manchester Utd vs Arsenal”, where in US the same game will take the form “Arsenal vs. Manchester Utd”…