I do not have the streaming service so I cannot see the details of the Netflix listing (link)
This site has a listeing of all Netflix streaming movies and it lists Underdogs but with The Unbeatables (UK voice actors dub) cast. (link)
This site has a listing for "Underdogs" but the artwork is The Unbeatables and it links to Netflix entry for Underdogs. (link)
So this would not be the same version that is listed on HSX.
However, I do have access to Netflix DVDs service and they are listing Underdogs with the US voice cast (Bella Thorne) and are giving the DVD a July 2016 release date. [link)
Here is a site that is advertising Underdogs (US dub = Bella Thorne) with a 7/19/16 release date (link)
Meanwhile back at Amazon.com... they have a listing for Underdogs that combines the 2013 football movie with the same title and the animated movie with the same title under the same listing (link) I posted about this before on the HSX Boards when there was a previous release date but I believe my post was scrubbed. If you look at the Underdogs entry at Amazon (the last link I posted two sentences ago) the second listing has a 7/19/16 release date (same date as the other site I posted) and if we click on that entry we get (link):
a DVD release of Underdogs on 7/19/16 (consistant with Netflix DVD and the other site I linked)
Product Details -
Animated (this is not the DB Sweeney football movie)
Anchor Bay/Starz (Weinstein owns 25% of Anchor Bay which it uses to distribute its video releases)