ハイデザート・マーベリックス
Seager spent the majority of the 2009 season with the Class-A Clinton LumberKings. He hit .275 with a home run and 22 RBI. He also played one game with the AZL Mariners and two with the Class-A Advanced High Desert Mavericks. Seager spent the entire 2010 season with the High Desert Mavericks, batting .345 with 14 home runs and 74 RBI.