Luck? Maybe one year he caught most everything he got close to, the next he didn't. Maybe one year his legs weren't as fresh because he was drinking more, or his wife had a kid or three, or maybe he just had a series of off days on the days he had chances that swung his score from good to bad? Deltas in outcomes are driven by A LOT of variables, that doesn't mean how you measure those outcomes is wrong. some days, big companies do everything right. Other days, a system goes down, or someone goes on PTO, or someone gets jury duty, and everything goes wrong. Now, imagine that when there are only 9 people involved in producing the outcomes........any 1 person of 9 can having a bad day can really throw things off.