Arizona Fall League Preview: Tampa Bay Rays
By Grace Turner ·
The Rays' Arizona Fall League group leans on pitching depth more than star power. One 80Grade top-100 prospect anchors the position-player side, and a left-handed reliever coming off an eye-catching Single-A season sits at the back of the bullpen. All eight head to the Scottsdale Scorpions.
Flewelling Is 19 and Already Hitting for Power at High-A
Nathan Flewelling is the headliner, and the case for that billing is straightforward: he is a 19-year-old catcher who hit 21 home runs in 106 games at High-A Bowling Green this season, up from six in 2025. Power production like that from a teenager behind the plate is uncommon, and it is the center of why 80Grade ranks him No. 4 in the Tampa Bay system and No. 98 overall. He was also on the American League roster for the Futures Game in July.
The full High-A line reads .243/.364/.452 with a 14.6 percent walk rate and a 27.2 percent strikeout rate. The on-base numbers are the foundation of the offensive case: Flewelling drew 71 walks in 486 plate appearances, which is a genuine skill at any level. His 80Grade report credits him with strong strike-zone awareness and ties the strikeouts to contact against professional breaking balls and velocity rather than undisciplined expansion.
The scouting read is that the left-handed swing is compact enough to produce real bat speed, and the 2026 home-run total suggests the raw power is starting to show up in games. The defensive profile remains the larger unknown. He caught 75 games and served as the designated hitter in 31 this year, and staying behind the plate would make everything about the offensive package more valuable. The Fall League gives him extended reps working with pitchers from other organizations, calling games, and handling the grind of daily catching.
What to watch: whether the contact rate improves against AFL velocity and breaking balls, and how his receiving and game management look to observers.
Summerhill's Speed and Contact Profile Get More Time
Brendan Summerhill split 2026 across three levels and made two trips to the injured list, one from late April to mid-May and another in August, which made for an uneven first full professional season. His combined line across Single-A Charleston, the Florida Complex League, and High-A comes out to .251/.351/.353 with 24 stolen bases and a 12.2 percent walk rate against a 14.6 percent strikeout rate. The strikeout-to-walk balance is good; the power production is light.
His 80Grade report is built around a plus hit tool, plus speed, and above-average defense in center field. The home run total (five in 85 games) and the .353 slugging percentage are where the profile gets complicated. An everyday center fielder projection requires either the power creeping toward average or contact and on-base skills good enough to carry without it, and right now it is a bet on the former.
The High-A stint (15 games, .283/.343/.333) sent a mixed signal: the average held up, the walk rate dipped, and the strikeout rate rose to 20.9 percent. It is a small sample, and the AFL gives the 22-year-old more at-bats against advanced pitching after a season interrupted by injury. 80Grade ranks him No. 15 in the Rays system.
Teus Posted Numbers That Earn a Hard Look
Yereny Teus is the sleeper of the group, and it is not hard to see why. The left-hander pitched in 31 games out of the bullpen at Single-A Charleston and posted a 2.00 ERA with 80 strikeouts in 54 innings. That is a 38.1 percent strikeout rate, with a 0.81 WHIP and one home run allowed all season. He went 6-0 with seven saves.
His 80Grade report projects him as a reliever who leans on a heavy sinker, and the home-run suppression fits that profile: when he misses, he tends to keep the ball on the ground rather than in the air. The command is a legitimate concern, with a 10.5 percent walk rate, but the results were too good to dismiss.
The projection is a fringe big-league reliever or Quad-A arm without a more reliable third pitch, and the report grades the changeup below average. If the sinker plays up and the slider firms up, the ceiling rises. The AFL will give evaluators a better look at how those secondary pitches play against hitters well beyond Single-A, which is the key question for Teus heading into 2027.
Marcus Johnson Needs a Reset
Marcus Johnson opened 2026 at Double-A Montgomery, moved up to Triple-A Durham within a week, and went on the injured list in late April. He did not return until mid-August, and his numbers were difficult to work with at either level. At Durham, he had a 10.69 ERA, allowed 25 hits and nine walks in 16 innings, and struck out 9.9 percent of batters. At Montgomery, he posted a 6.62 ERA and gave up seven home runs in 17.2 innings, though the walk rate was a manageable 2.7 percent.
His 80Grade report grades him as a back-end starter or swingman with enough strike-throwing to work through lineups, but the 2026 results exposed his margin for error. He allowed 10 home runs in 33.2 innings. The report lists average command as an asset; this season points to a pitcher who finds the zone but does not find the edges consistently against advanced hitters.
At 25, he is not a major prospect, but he threw 138 innings at High-A in 2025 and has enough strike-throwing to remain useful depth if the results stabilize. The AFL is a chance to get clean innings.
The Rest: Nichols, Rodriguez, De Jesus, and Polanco Round Out the Group
Mason Nichols had a tale of two stints in 2026. At Single-A Charleston, he posted a 3.66 ERA with a 30.9 percent strikeout rate and a 12.7 percent walk rate across 27 games. After a July promotion to High-A Bowling Green, his ERA ballooned to 8.84, he allowed six home runs in 19.1 innings, and his strikeout rate fell to 22.9 percent. Combined, he struck out 73 in 58.2 innings with a 5.37 ERA, a reliever profile with bat-missing ability but command and contact-management problems that showed up sharply at the higher level. His 80Grade report has a 92 to 95 mph four-seamer, a changeup that profiles as his best secondary, and a cutter and slider that grade average or below. The Fall League is a chance to see what the stuff looks like when the command holds.
Andy Rodriguez spent mid-June to mid-August on the injured list, including a transfer to the 60-day IL in July, which limited him to 30.1 innings at High-A. The line was workable: a 3.86 ERA, a 1.52 WHIP, and 24 strikeouts in 130 batters faced. The 11.5 percent walk rate needs to come down, and the AFL serves as a make-up stint for the lost time.
Cesar De Jesus is a left-hander who worked 26.2 innings at Single-A Charleston with a 2.36 ERA, 29 strikeouts, and no home runs allowed around a July and August injured list stint. The walk rate (14.4 percent) and pitch inefficiency (19.4 pitches per inning) are the flags. He is 23, and the AFL is a developmental step rather than a showcase. Watch the strike-throwing.
Narciso Polanco, the group's third position player, is a 21-year-old infielder who hit .253/.339/.385 across 116 games at High-A Bowling Green with nine home runs, 23 doubles, and 25 stolen bases. He played 71 games at shortstop and 43 at third base. The 10.9 percent walk rate and 21.4 percent strikeout rate make for a playable offensive profile, and the production and age make him one to monitor as he likely pushes toward Double-A in 2027.
The Fall League performance Tampa Bay will watch most closely is Flewelling's. The power and the approach have both shown up in games, and whether he can stay behind the plate and tighten the contact rate against better competition is the central developmental question for one of the better young catching prospects in the minors. A strong fall would not answer everything, but it would keep the timeline moving for a player who, at 19, is already ahead of schedule.