I never said Owen was a bad player, I'm just saying that Harold dodging Owen's balls isn't some godly ability, and the fact that Owen got out four campers in a row rather quickly is not that great when two of them suck. Owen's still a good player, mind you. Just don't take it like Harold is some uber-awesome character because he was able to catch one of Owen's balls.
Actually, Owen's strategy was significantly different from Duncan's. Recall that each time the blitz happened on the Bass team, it was with four balls thrown from different angles. Owen, being a single player, can only throw the ball from one point. Also, given that Owen has one target, they are all going from Point A to Point B. The lack of variation is going to hurt significantly more.
Please rewatch the episode: It was Courtney who told Harold to catch the ball, not Duncan. Geoff said that dodging wasn't enough, Duncan said Harold would be unable to throw out Owen, then Courtney said to catch the ball.
And again, there is no evidence of Harold wanting to prank off Courtney because of anything Courtney did to him. Harold was expressly clear that he performed the crime to get back at Duncan because Courtney was his girlfriend.