This group includes a couple of pitchers who have already had a little time in the major leagues. With the pitching talent, the Mariners have drafted the last couple of years is why they are listed in this range.
#21 Taylor Guilbeau: left-handed reliever acquired at the deadline by the Mariners for Roenis Elias from the Washington Nationals. Guilbeau was drafted in the 10th round by the Nationals in 2015. He spent 2019 first in double-A for the Nationals before being promoted to triple-A. His arrival in the trade the Mariners sent him to Tacoma.
On August 15, the Mariners brought him up to the big club where he became the team’s left-handed specialist, facing mostly left-handed hitters. Right now, he is still in that position leading into spring training. It is his job to lose.
#22 Juan Querecuto: A shortstop signed as an international player in 2017. The Mariners are hoping he will add strength and live up to his potential to be a major league shortstop. He is only 19 so time is on his side. Juan spent 2019 in the rookie Arizona League. We hope the best for this young man.
#23 Ricardo Sanchez: a left-handed starting pitcher the Mariners acquired in November 2018 from the Atlanta Braves. He was originally signed as an international player in 2013 by Los Angeles and Jerry Dipoto.
The Mariners are hoping to tap into the potential he showed back in 2013. He spent last season at double-A Arkansas. Unless he has a good spring training we could see him back at Arkansas for a second try. Sanchez is 22 and a left-handed pitcher so the Mariners will give him the opportunity to make it to the major leagues.
#24 Dom Thompson-Williams: A left-handed hitting outfielder the Mariners acquired as the third player for James Paxton from the Yankees. Last year he got off to a good start at double-A Arkansas, but then struggle most of the season, ending up batting .234. He is projected as a fourth outfielder.
This winter, Thompson-Williams was eligible for the Rule 5 draft but no team decided to take a chance on him since he would have to spend the year on the major roster. He will probably start the 2020 season again in Arkansas, where he needs to show improvement to have any chance to make it to the major leagues with the Mariners. He could be involved in any multi-player deal the Mariners may make in a similar manner as they acquired him for Paxton.
#25 Art Warren: right-handed reliever selected in the 23rd round back in 2015. Warren’s first two years in the Mariners’ farm system came as a starter before they moved him to the bullpen. He has shown a lot of ability as a reliever being dominant at times.
However, a shoulder injury keeping him out most of 2018. Had Warren been healthy in 2018 he likely would have been in the Mariner bullpen sometime that season. Seattle is hoping he can be part of the bullpen this season after being called up in September.
Finally, the last installment will come up with prospects 26 thru 30. This group will have a hard time getting to the major leagues because of the guys ahead of them but they still have the chance to make it.