This year’s Home Run Derby will look a little different when the sluggers square off Monday night in Philadelphia. Instead of limiting the hitters to a certain number of “outs,” or non-home run batted balls, they will be limited to a specific number of swings.The most important effect this should have is a reduced workload on the hitters. Home Run Derby participants almost certainly won’t hit 30 or even 40 homers in a single round as they have in the past, since they will receive only 20 swings in the first round and 15 swings in the second and final rounds. (However, hitters will be able to continue to swing, until they make an out, if they homer on their final swing of a round.)Said another way, endurance will matter less this year than pure, raw power.Maybe that’s more in line with what the event is supposed to celebrate. It could also produce a better final than the prior rules managed to create in the past few years. Of the 20 best single rounds in the Derby since 2017, only one occurred in the finals. And that round — Vladimir Guerrero Jr.’s 25-homer closing statement in 2023 — is tied for 15th.In the past, when looking at the Derby field and trying to predict the outcome, it made sense to focus on the final round, and to focus on the winners. But these new rules may not produce the pattern we’ve seen recently, where a great hitter hits a ton of homers in the quarterfinals or semifinals, and then both hitters seem a little gassed in the last round. With the Derby operating without a clock for the first time since 2014, and the focus more on raw power than endurance, let’s instead look at the best rounds of all time and see what insights we can glean.Here are the best rounds in the last eight derbies: