The 5 is better I think, though I'd prefer it if the player wasn't clipped as much. Have you tried doing a 5 shot with the width of the single shots the same as the tryptich?
I like the gold frame on the first one, but the sequence on the second one, does that help?
Something sort of between the two? The three isn't quite enough, the five maybe a bit too much....
I'm also a sports nut, and I agree with the cat above.
The series of 5 looks a little crowded to me. I think the 3 shot actually makes it easier to envision the dunk. Both are AWESOME, though.
I like the series of 3. 5 is unnecessary in my opinion.