Piloted this deck to rank 2 last season and off to a very quick start this season. Not much to say other than the deck is pretty self-explanatory. Never underestimate how valuable Bearshark is vs. Priest/Hunter/Druid, ie. Bearshark into Houndmaster is very strong. Leeroy Jenkins is just a finisher because this deck has a lot of awkward situations where perhaps you're in topdecking mode or you just need another finisher. Ironbeak Owl is in for Paladin's Spikeridged Steed or Hooked Reaver mostly. There are plenty of silence worthy minions in this meta, especially with the resurgence of dragon decks. Honestly, you have a great matchup vs. most Hunters and Priests. You will hate Odd Quest Warrior and Dragon Priest can be awkward sometimes.
Mulligan Guide (Very simple)
Crackling Razormaw can be great especially with 1 drop.
Headhunter's Hatchet if you have a 1 drop that you are confident will stay or if you fear a certain 2 drop from your opponent's side such as Paladin/Shaman/Hunter etc.
Bearshark- Not always the best mulligan even against strong matchups but can be great if you can comfortably curve it out.
Deathstalker Rexxar- Odd Warrior, just trust me.
Unleash the Hounds vs Odd. Paladin
Proof of Winrate: https://imgur.com/gallery/6IKwqcf
Proof of Rank: https://imgur.com/gallery/SmELDFz