The Seattle Mariners locked down rookie outfielder Julio Rodriguez with a 14-year contract extension that includes $210 million guaranteed but could grow to more than $400 million, according to ESPN's Jeff Passan.

Rodriguez, 21, is having a wonderful rookie season after making his MLB debut this year following four years in the minor leagues. He's currently batting .269 with a .799 OPS with 20 home runs, 23 stolen bases and 64 RBIs in 108 games with the Mariners. He won American League Rookie of the Month in May and June and was one of six rookies to make the MLB All-Star roster. Rodriguez also finished second in the Home Run Derby behind Juan Soto.

Rodriguez is currently the heavy favorite to win AL Rookie of the Year with -450 odds to win the award, per BetMGM.

The Mariners, meanwhile, are squarely in the AL Wild Card race at 68-57. They're 2.5 games ahead of the Baltimore Orioles with only a 1-1.5 games difference between the two other teams currently in the wild card positions.