Trammell, the most notable name in the bunch, is a former first-round pick (No. 35 to the Reds in 2016) and a top 100-caliber prospect who has been involved in two significant trades over the past couple years. He was first part of the mega-deal involving the Trevor Bauer, the Padres, Reds and Indians in 2019. San Diego then dealt Trammell to the Mariners in a seven-player swap before last August’s trade deadline. The 23-year-old now ranks as the Mariners’ No. 5 prospect at MLB.com.
Then, whom the Mariners acquired from the Yankees in a summer 2019 trade centering on Edwin Encarnacion, is MLB.com’s No. 14 Mariners prospect. Delaplane (No. 20) and Mills (No. 23) are also in their top 30. The Mariners added Delaplane with a 23rd-round pick in 2017 and picked up Mills, a Washington native, in Round 3 during the same year.