The NASCAR Championship 4 has been set after Ryan Blaney earns his second walk-off win at Martinsville in the last two years. What a performance from Blaney and his team to advance to Phoenix for a chance to defend his title. This is the time of the year when Ryan Blaney steps up. Now he is on his way to another Championship 4. Could Blaney become the first back-to-back champ since Jimmie Johnson? CLICK HERE to go to PrizePicks and use code ON3 to receive a guaranteed $50 once you play $5 in lineups! Blaney will join Tyler Reddick and Joey Logano in the Championship 4. Now we wait for NASCAR t…