​Home Run Derby records: Most home runs hit in a single round, year and career in MLB history originally appeared on The Sporting News. Add The Sporting News as a Preferred Source by clicking here.Some MLB players know how to put on a show, making them the perfect fit for baseball’s slugfest.AdvertisementAdvertisementAdvertisementFrom Julio Rodriguez and Vladimir Guerrero Jr. to Pete Alonso and Aaron Judge, the Home Run Derby has seen its fair share of mashers in recent history.The Mariners star put on an unbelievable performance in front of his home crowd at T-Mobile Park in 2023, smacking 41 dingers during his opening round to set a record.The Home Run Derby is a marathon, though, and players who can hit more bombs than anyone else over the course of three rounds (almost) always come out on top. That’s exactly what Guerrero Jr. did in 2019 when he hit a record 91 homers at Progressive Field in Cleveland.Who are the Home Run Derby record holders? The Sporting News has what you need to know.AdvertisementAdvertisementAdvertisementMORE: Home Run Derby winners by year: Complete list of MLB players to win baseball’s slugfestThe 2023 first-round performance from Rodriguez? That would be a record. No one has ever hit more than Rodriguez’s 41 home runs in a single round.The previous record was set during an epic showdown between Guerrero and Joc Pederson in the 2019 semifinals. Guerrero edged out Pederson after three swing-offs 40-39, after the two tied 29-29 at the end of regulation.Guerrero would lose in the final to Alonso. Two years later, Alonso hit the third-most in a round, 35 at Coors Field, with Soto hitting 31.AdvertisementAdvertisementAdvertisementIn the 2022 Home Run Derby, Rodriguez hit 32 home runs in the first round, the most by any rookie in the history of the derby.PlayerTeamYear, roundPark (city)HRsJulio RodriguezMariners2023, first roundT-Mobile Park (Seattle)41Vladimir Guerrero Jr.Blue Jays2019 semifinalsProgressive Field (Cleveland)40Joc PedersonDodgers2019 semifinalsProgressive Field (Cleveland)39Randy ArozarenaRays2023, second roundT-Mobile Park (Seattle)35Pete AlonsoMets2021 first roundCoors Field (Denver)35Julio RodriguezMariners2022 first roundDodger Stadium (Los Angeles)32Juan SotoNationals2021 first roundCoors Field (Denver)31Julio RodriguezMariners2022 second roundDodger Stadium (Los Angeles)31Vladimir Guerrero Jr.Blue Jays2019 first roundProgressive Field (Cleveland)29MORE: Ken Griffey Jr., Pete Alonso lead list of sluggers with multiple Home Run Derby titlesOnce again, it shouldn’t come as a surprise that all of these totals were compiled after 2014. But it does highlight some of the great showdowns of recent years.Guerrero’s 91 homers in 2019 are the record, but to be fair to Alonso, he never got to hit first in a round and set a total. Guerrero, on the other hand, always had to go first as the No. 8 seed. In other words, Alonso was limited to 57 because he only had to reach cutoff numbers.AdvertisementAdvertisementAdver