The 2018 Arizona Fall League rosters were announced on Thursday. Washington’s Nationals are sending eight players to the so-called finishing school for the game’s top prospects, to suit up for the Salt River Rafters, who play home games at Salt River Fields at Talking Stick in Scottsdale, AZ.
Ben Braymer, a 24-year-old lefty, is a 2016 18th Round pick out of Auburn, who has put up a 2.32 ERA with 32 walks and 114 Ks in 112 2⁄3 innings between Low-A Hagerstown and High-A Potomac this season.
Taylor Guilbeau is a 25-year-old left-hander taken in the 10th Round of the 2015 Draft, who has a 2.60 ERA, 15 walks, and 34 Ks in 34 2⁄3 IP out of the Potomac Nationals’ bullpen this season.
Jordan Mills, 26, is the third lefty the Nationals are sending to the AFL. A 2013 28th Round pick by the Houston Astros, Mills signed with the Nats this April, and has put up a 1.90 ERA, 19 walks, and 60 Ks in 52 IP between High-A Potomac and Double-A Harrisburg this season.
Luis Reyes, a 23-year-old right-hander, signed as an 18-year-old out of the Dominican Republic for $85,000 in 2012. He’s currently ranked No. 24 on MLB’s list of the Top 30 prospects in Washington’s organization, with their scouting report noting that his, “stuff arguably is the best among right-handed pitchers in Washington’s system.”
In 15 starts between the NY/Penn League’s Auburn Doubledays, GCL Nationals, and the Harrisburg Senators this season, Reyes has put up a 5.30 ERA with 33 walks and 42 Ks.
Tres Barrera, 23, is a catcher selected in the 6th Round of the 2016 Draft out of the University of Texas at Austin.
In 66 games and 281 plate appearances for the Potomac Nationals this season, Barrera has put up a .258/.332/.373 line with 14 doubles and five home runs.
Barrera is currently ranked No. 17 overall in the Nats’ system by MLB.com’s Pipeline scouts, who describe him as having, “... plus raw right-handed power which he generates with a combination of bat speed and strength.”
Carter Kieboom and Jake Noll are the two infielders the Nationals are sending to Arizona.
Kieboom, 20, has put up a combined .284/.360/.452 line with 30 doubles and 16 home runs in 119 games and 539 plate appearances between High-A and Double-A in the Nats’ system this season.
Ranked No. 2 overall in the organization by MLB.com’s Pipeline scouts, Kieboom’s described as having, “solid range and above-average arm strength, [which] give him a chance to stick at shortstop, although some believe he’ll eventually end up at third base.”
Noll, 24, and a 2016 7th Round pick out Florida Gulf Coast University, has a .295/.345/.420 line, 20 doubles, and 11 home runs in 128 games and 530 PAs between High-A and Double-A in the Nationals’ organization in 2018.
Outfielder Daniel Johnson rounds out the list. Johnson, 23, was a 2016 5th Round pick out of New Mexico State University, who was named the organization’s 2017 Minor League Player of the Year after putting up a .298/.356/.505 line with 29 doubles and 22 home runs in 130 games and 549 PAs between Hagerstown and Potomac last season before he went to the AFL and put up a .217/.270/.290 line in 17 games and 74 PAs.
Ranked No. 8 in the organization by MLB.com’s scouts, Johnson has put up a .275/.336/.421 line with 17 doubles, seven triples, and seven home runs in 91 games and 395 PAs this year, mostly at Double-A, with seven games with the GCL Nats.