Upset still possible but I can be more biased here since byt stats and by capabilities Shakur do have a huge advantage.
Not unless if Yoshino will get that lucky opening and throw a KO punch that will bring Shakur in the floor.
The chances of Stevenson getting knocked out are very low because we know how careful of a boxer he is. According to his stats, he is not a KO artist and yet remains undefeated. This means that he does not take unnecessary risks by going toe to toe and instead relies on his advantage, which is his quickness. Therefore, it is possible for him to get KOed, but the chances are close to none.
And the skills and the opponents that Yoshino face, it's all Japanese, not saying that they are not good or tough, but Stevenson has face tougher opponents and won all of them, although his knockout percentage is not that high. But as we all know, it's better to take a win in either case, UD or knockout is still a W. For sure the camp of Stevenson has seen his record and will not underestimate the strength of the Japanese. On the contrary, with Shakur's talent, he might play with Yoshino's strength and power and beat him on his own game. So it's going to be a good fight, but in the end, Stevenson will be too much and win this fight.
There is definitely a good reason why Shakur and his camp chose to fight Yoshino in his debut, aside from the fact that they are looking forward to make a statement on his climb, they aren't taking any chance to give Shakur a bad impression on his first fight at 135. I believe they chose Yoshino because the Japanese boxer doesn't have any good credentials on his record and haven't got any good names too. In the end, this is just a cherry picked fight to highlight Shakur on his climb.
