He may have slowed down a bit but as we get older we have more power, his experience will also be a big advantage for him here. It's just the stamina that I think will be the issue here. If Santiago will try to wear him down first then it will depend on how well he will control the ring. Jabs will be really helpful as his long reach has the advantage at 174 cm against 166 cm of Santiago.
True, he may have slowed down, but I don't mind. He isn't fighting Inoue, so he doesn't need lots of quickness. He will be fighting Santiago, who is not even a popular boxer, so I guess Donaire should have the edge in every angle. If we talk about him being old, that's another story, as we need to see if he performs like an old boxer in this coming match.
Donaire has the length and with great timing, that could be his biggest advantage.
We are biased sometimes, and since Donaire is from our country, we should support him. What we can do is bet on him. I'll be happy to bet a decent amount on this fight, as long as Donaire isn't a heavy favorite. I'm still concerned about the odds, but I'm confident that Donaire will become a champion again.