If you didn't know who Seattle Mariners rookie sensation Julio Rodriguez was before the Home Run Derby, you certainly do now.Rodriguez absolutely dominated the first round of the Home Run Derby with a whopping 32 home runs. He went from being an underdog to a favorite after just one round.While Rodriguez had 32 home runs, Corey Seager recorded 24. The Texas Rangers slugger put in an impressive performance, but it was not enough to beat Rodriguez.Talkin' Baseball posted a video of the final home runs hit by the rookie to their Twitter.Talkin’ Baseball@TalkinBaseball_Julio Rodríguez finishes off an electric first round with 32 homers!36031Julio Rodríguez finishes off an electric first round with 32 homers! https://t.co/xmDd0mWrsxThe Seattle Mariners and their fans have always known that they had an outstanding rookie. After this performance at the Home Run Derby, the entire MLB world now knows it, too. Patrick Mason@patmas98@MLBONFOX @JRODshow44 @Mariners That was EPIC! What a start!8@MLBONFOX @JRODshow44 @Mariners That was EPIC! What a start!Since it was Rodriguez's first time competing in this prestigious event, it was important for him to perform well. If he wants to grow his brand and celebrity status, winning the Home Run Derby as a rookie would be huge.NephewsPod@NephewsPodAwesome showing from JRod twitter.com/TalkinBaseball…Talkin’ Baseball@TalkinBaseball_Julio Rodríguez finishes off an electric first round with 32 homers!40931Julio Rodríguez finishes off an electric first round with 32 homers! https://t.co/xmDd0mWrsxAwesome showing from JRod twitter.com/TalkinBaseball…Seattle Mariners star Julio Rodriguez steals the show at Home Run Derby2022 T-Mobile Home Run Derby, Julio RodriguezWhile this is only the first round of the Home Run Derby, it could easily be the most memorable. Julio Rodriguez was hitting dingers with such power and consistency that it was a sight to behold.Ryan Aschbrenner@Asch_ryanMe after watching Julio Rodriguez smack 32 taters1Me after watching Julio Rodriguez smack 32 taters https://t.co/b62FGWpacfIn most other rounds, Corey Seager's 24 homers would be more than enough to advance. Unfortunately, he went up against a rookie who had something to prove.Larry Stone@StoneLarryYou've got to feel for Corey Seager. 24 homers would win most rounds in most years. But he had the misfortune to go against Julio Rodriguez when he was on a roll.1915You've got to feel for Corey Seager. 24 homers would win most rounds in most years. But he had the misfortune to go against Julio Rodriguez when he was on a roll.Seattle Mariners fans already knew Rodriguez was incredible. While it might still be early in his career, many are ready for him to make a long-term commitment.STANLEY CUP CHAMPIONS SZN!!!@KCAvsFan9@Mariners @JRODshow44 Sign him 15 years, blank check.5@Mariners @JRODshow44 Sign him 15 years, blank check.If this performance in the Home Run Derby is anything to go by, Rodriguez's ceiling is sky high. While he may have only 16 home runs on the season so far, he clearly has the power necessary to get far more.Hunt-38@Hunt38_YT@Mariners @JRODshow44 It’s Julio’s world we just live it in13@Mariners @JRODshow44 It’s Julio’s world we just live it inAmateur photographer and former Seattle Mariners and Cincinnati Reds legend Ken Griffey Jr. was there to soak up all the action. The images he photographed link two different eras of Mariners history.Talkin’ Baseball@TalkinBaseball_Griffey is locked in on Julio Rodriguez!66654Griffey is locked in on Julio Rodriguez! https://t.co/ZymITyHaIiEvery spotlight in the baseball world is now pointed squarely at Julio Rodriguez. This could be looked back on as a star-making performance for the 21-year-old rookie who has a bright future ahead of him.