Dele is a truly fascinating case. He's one of those players whose Wikipedia pages I always return to, just to remind myself of how good he was and how shockingly far he fell.
That one season when he scored almost 20 Prem goals, he looked extraordinary. And he was. He was a very, very good player for a few seasons and then it all just fell apart. I don't take any particular pleasure in seeing a young athlete fail to reach their potential, but there's something so curious about it.
I can think of a few other players who had those little flash in the pan moments or "one season wonders", but there aren't many examples quite like Dele who looked so good and then dropped off so dramatically.
I'll just mention Oscar. I thought he looked like such a fantastic player at Chelsea, especially in the first couple of seasons. Looked like the next Kaka, someone who could drive Brazil to a World Cup win and have a fantastic career.
Instead, for one reason ($$$) or another, the lad decided at 25 to leave the exciting and competitive European leagues to cash cheques in China. Never played for Brazil again. I'm sure he's earnt plenty over there and that's what counts for some players, but he could easily have earnt millions while winning trophies and potentially playing at a Real or a Barca if he'd stuck it out and knuckled down, not to mention what he could have achieved with his country. Real waste of talent, that.