Last Updated on May 24, 2020 by Jason A. Churchill

The Seattle Mariners farm system is filled with depth, mixed with impact and ceiling, but perhaps one of the more underrated aspect of the status of said farm is how many of the Top 50 prospects may very well see the big leagues in 2020.

Here’s every Top 50 prospect with an ETA of 2020.

One thing to note: Roster expansion in September will be limited to 28, just two additional active spots than the regular season. This could impact some of the ETAs below from coming to fruition.

48. Gerson Bautista, RHR

Bautista made his MLB debut in 2018 with the Mets and pitched in eight game for Seattle a year ago. There’s a ton of reliever competition this season, but a stretch of fringe-average control may get Bautista a look.

Top 50: Nos. 31-50

44. Donnie Walton, UT1

Walton made his debut last September, playing in seven games and receiving 19 plate appearances. The club is stacked with extra infielder and utility options, but Walton probably sees the majors again in ’20.

42. Tim Lopes, UT1

For me, Lopes is better than Dylan Moore, but the Mariners like Moore’s power potential and are likely to send both Walton and Lopes back to Tacoma to start the season, unless one of the two is the 26th man. Lopes is debuted last September.

29. Art Warren, RHR

Warren made six appearances last September and looked solid, giving him a chance to break camp with the big club in March.

Top 50: Nos. 21-30

27. Sam Delaplane, RHR

Delaplane has ‘opener’ written all over him and may have a shot to start the season as one of eight or nine relievers. At worst, he sees he bigs over the summer.

24. Wyatt Mills, RHR

Mills is another reliever likely to see the big leagues at some point in 2020.

23. Yohan Ramirez, RHR

Ramirez was the club’s Rule 5 pick in December and enters Cactus League play looking to give the Mariners a reason to carry him to start 2020.

22. Aaron Fletcher, LHR

He’s up to 95 mph with a 55 slider. Going to be tough to keep Fletcher from the major leagues this season.

21. Joey Gerber, RHR

Among the higher-ceiling relievers in the system, Gerber’s combo of velocity (93-97 mph), fastball life, a plus slider and projectable command strongly suggest a 2020 debut.

19. Taylor Guilbeau, LHR

Guilbeau is a reverse-split lefty with a 95 mph fastball and a good changeup. He made his debut last August and may break camp in the bullpen next month.

Top 50: Nos. 16-20

18. Braden Bishop, CF

Bishop saw the big leagues last year — he was on the Opening Day roster and returned after a strong stint in Tacoma — but injuries derailed his attempt to get his feet wet. Could make the club out of spring training for the second straight spring.

17. Jake Fraley, CF

The injury to Mitch Haniger could help Bishop and Fraley both start 2020 in the majors. Fraley’s 2019 also ended with a stint on the IL, but he did get 41 plate appearances with the parent club.

14. Jose Siri, CF

Siri has the biggest upside of the center field prospects but also needs the most work at the plate. Despite several options, the former Reds prospect should see the majors at some point this season.

Top 50: Nos. 11-15

11. Justin Dunn, RHS

Dunn debuted last September with a handful of short outings, but should get some starts with the Mariners in 2020, provided things go well enough in the minors early in the year.

9. Evan White, 1B

White was always going to have a chance to earn his way to the majors in 2020, but the Mariners, perhaps somewhat unwisely, have already made the decision he’ll start the season as the regular first baseman.

Top 50: Nos. 6-10

8. Justus Sheffield, LHS

Sheffield debuted with the Yankees in 2018 and made eight appearances for Seattle in 2019. He’ll be in the bigs to start 2020.

7. Kyle Lewis, RF

Lewis needs time to polish up his plate coverage, pitch recognition and … well, a lot of things, but he debuted last September and showed big power. He’ll see the majors in ’20 but the question is when. I do not believe it’s wise to start Lewis in the majors.

3. Logan Gilbert, RHS

Gilbert almost certainly starts the year in Arkansas, but as long as he’s healthy will see Seattle at some point over the summer months.

Gilbert Scouting Report

These Five Have a Chance, Too

I don’t have 2020 ETAs on any of these five, but it wouldn’t surprise me at all if we see every one of them get the nod in 2020.

35. Raymond Kerr, LHR

Power lefty up to triple digits with a 55 breaking ball sounds like a major leaguer already. Better command gets him there.

33. Jake Haberer, RHR

Haberer has a big fastball up to 98 mph and a power breaking ball for swings and misses. He’ll need to find the strike zone more, but the stuff is unquestionable.

32. Ljay Newsome, RHS

Newsome is a strike thrower whose stuff jumped last spring when he flashed a fastball up to 94 mph and more consistently into the low-90s, something he’d never shown in games before. He fell back to the upper-80s later in the season, but he commands everything and profiles as a No. 5 or swing man.

5. Cal Raleigh, C

If Raleigh shows better contact rates in Arkansas he could pave his own path to Seattle by the end of the year, though he likely sees Tacoma for a bit before getting the call.

Raleigh Scouting Report

1. Jarred Kelenic, CF

Kelenic is probably on a faster track than Raleigh, so, do the math.

Kelenic Scouting Report

What About The Next 42?

Believe it or not, there are quite a few from The Next 42 that also could see the big leagues in 2020. Some more likely than others.

Sam Haggerty, UT2

Darren McCaughan, RHR

Ian McKinney, LHS

Phillips Valdez, RHR

Jack Anderson, RHR

Anthony Misiewicz, LHR

Kyle Wilcox, RHR