The Yahoo Adds Sheet — 2026-05-09

Below are Yahoo's top 15 roster-movement gainers today (May 9, 2026), ranked by day-over-day ownership delta. Probable pitchers are excluded; every recommendation is grounded in transaction news, depth-chart slot, and 14-day Statcast peripherals.

#1 HOLD Ryan Waldschmidt

OF · AZ · 6% → 8% owned (▲ +2.0pp)

Why he's being added: Arizona shocked the league by DFAing starting center fielder Alek Thomas and promoting No. 1 prospect Ryan Waldschmidt to the MLB roster (@BNightengale, 2026-05-08). Waldschmidt slots in as the CF backup on the depth chart but inherits steady playing time in a major-league lineup. His Statcast profile is hot: xwOBA of .354 and xBA of .331 signal genuine contact quality, not noise.

Stream ░░░░░░░░▓▓ Hold · 80% — strong hold

Verdict: HOLD. This is a bonafide MLB callup with a clear role-lock and elite prospect pedigree backing the metrics. Ride him through the adjustment period; the depth chart and Statcast support a sustained contributor.

#2 STREAM Brooks Raley

RP · NYM · 2% → 3% owned (▲ +1.0pp)

Why he's being added: Brooks Raley (3% owned) posted a sparkling 5.1 IP, 8 K, 0.00 ERA line over five games in the last 14 days, riding clean appearances and elite strikeout peripherals. His xERA of 2.99 and 96.0 K% suggest real competence, but his #5 backup role on the depth chart limits ceiling.

Stream ▓▓▓▓▓░░░░░ Hold · 50% — neutral

Verdict: STREAM. Brooks Raley is a short-term relief option riding a hot streak, but his backup depth slot and lack of save opportunities make him a matchup play only. Drop after the bump cools or if he loses consecutive outings.

#3 HOLD Xander Bogaerts

SS · SD · 61% → 62% owned (▲ +1.0pp)

Why he's being added: Xander Bogaerts (62% owned) remains the #1 starter at shortstop, and while his 14-day line (.222 BA, 10-45) looks brutal, underlying metrics hint at variance: xwOBA .350 and 8.2% Barrel rate suggest better contact is coming. Sample is light—only 12 games in the window—so the slump may be noise.

Stream ░░░░░░▓▓▓▓ Hold · 65% — lean hold

Verdict: HOLD. Xander Bogaerts is an established shortstop in a defined MLB role; ride him. The .222 average is variance-driven, not skill-driven. His xwOBA aligns with a higher BA regression.

#4 AVOID Michael Conforto

OF · CHC · 0% → 1% owned (▲ +1.0pp)

Why he's being added: Michael Conforto (1% owned) burst onto waiver radars with a red-hot 14-day slash of .428 / 2 HR / 5 R, backed by xwOBA .448 and 17.2% Barrel rate. But his BABIP sits at .500—unsustainably high. He's also a #2 LF backup, not a starter, meaning limited path to consistent at-bats.

Stream ▓▓▓░░░░░░░ Hold · 30% — clear stream

Verdict: AVOID. Michael Conforto is a BABIP-driven mirage. His underlying Statcast looks solid, but the .500 BABIP will regress hard, and his bench role limits upside. Wait for a starting opportunity before adding.

#5 SELL Foster Griffin

SP/RP · WSH · 47% → 48% owned (▲ +1.0pp)

Why he's being added: Foster Griffin (48% owned) has posted an eye-popping 0.45 ERA over 20 IP (last 14 days, 3 G) with 20 K, earning modest ownership bumps. But his 3.38 ERA sits well below his 5.00 FIP, a classic regression flag. The xERA of 4.07 corroborates: his luck is running out.

Stream ░░░░░▓▓▓▓▓ Hold · 55% — neutral

Verdict: SELL. Foster Griffin is a textbook ERA-overperformer riding unsustainable luck. His FIP and xERA both point to a 4.07–5.00 true talent; the current 3.38 is a mirage. Fade or trade.

#6 HOLD Trent Grisham

OF · NYY · 43% → 44% owned (▲ +1.0pp)

Why he's being added: Trent Grisham (44% owned) has been pressing at the plate, posting a brutal .185 / 10-54 slash, but his Statcast reads like a hitter primed to break out: xwOBA .356, 13.9% Barrel rate, 51.5% HH%. His .160 BABIP is historically unlucky. @BryanHoch noted his "worst luck" and hinted at imminent positive regression (2026-05-08).

Stream ░░░░░░░▓▓▓ Hold · 80% — strong hold

Verdict: HOLD. Trent Grisham is the archetype of a buy-low in a #1 starter slot. His BABIP will normalize, his Statcast suggests real contact quality, and the beat consensus backs positive variance. Ride him.

#7 HOLD Mitch Keller

SP · PIT · 59% → 60% owned (▲ +1.0pp)

Why he's being added: Mitch Keller (60% owned) sits as the #4 starter and has delivered a clean 3.00 ERA, 16 K over 18 IP (last 14 days, 3 G). But his xERA (3.91) and modest K% (29.0%) suggest the ERA is lucky, not sustainable. Sample is light (only 3 games, 18 IP), so conviction is low.

Stream ░░░░░░░▓▓▓ Hold · 70% — lean hold

Verdict: HOLD. Mitch Keller is an established starter with defined role security; his elevated ownership (60%) reflects his slot. The light sample and xERA gap warrant caution, but he's not a drop. Stream elsewhere if you want higher upside.

#8 HOLD Gregory Soto

RP · PIT · 33% → 34% owned (▲ +1.0pp)

Why he's being added: Gregory Soto (34% owned) is locked in as the #1 closer with a 0.00 ERA, 2 SV over 6.1 IP (last 14 days), backed by elite xERA (1.87), 98.0 K%, and 76.0 Whiff%. His 2.13 season ERA sits just above his 2.88 FIP, signaling minor regression risk, but the peripherals are genuinely elite.

Stream ░░░░░░░░▓▓ Hold · 85% — strong hold

Verdict: HOLD. Gregory Soto is a confirmed closer with elite peripherals and a defined save role. Ride him; the minor ERA-vs-FIP gap is noise in a elite closer's profile.

#9 STREAM Griffin Canning

SP · SD · 21% → 22% owned (▲ +1.0pp)

Why he's being added: Griffin Canning (22% owned) slots as the #3 backup starter and posted a 1.80 ERA over 5 IP (1 game, last 14 days) with 7 K. His xERA of 3.39 is respectable, but the sample is tiny—only 5 IP in one start. No transaction, no depth-chart shift, just a hot outing.

Stream ▓▓▓▓░░░░░░ Hold · 40% — clear stream

Verdict: STREAM. Griffin Canning is a low-conviction add riding a single quality start. His backup depth slot and minimal sample size make him a matchup play only. Drop if the next outing is pedestrian.

#10 STRONG SELL JoJo Romero

RP · STL · 12% → 13% owned (▲ +1.0pp)

Why he's being added: JoJo Romero (13% owned) has been called up and is trending in waiver adds, but his underlying profile is a red flag. Over 7 games (last 14 days), he posted a 7.83 ERA with 4.6 IP—ugly. His 2.25 season ERA masks a 4.53 FIP and xERA that aligns much closer to the recent 7.83 disaster. K% is just 31%, and Whiff% is a paltry 17%.

Stream ▓░░░░░░░░░ Hold · 15% — strong sell

Verdict: AVOID. JoJo Romero is riding a mirage ERA sustained by unsustainable luck. His FIP, xERA, and dismal 14-day outing all point to a low-K, high-HR reliever masquerading as competent. Do not add; the regression is coming fast.

#11 HOLD Luke Raley

1B/OF · SEA · 9% → 10% owned (▲ +1.0pp)

Why he's being added: Luke Raley (10% owned) is the #1 RF starter despite a brutal .100 / 2-20 recent slash (last 7 games). But his Statcast is elite: xwOBA .399, 22.0% Barrel rate, and 54.2% HH% scream genuine power upside. His BABIP of .421 is unsustainably high, so regression is coming—but downward in AVG, not in the underlying hit quality.

Stream ░░░░░░░▓▓▓ Hold · 75% — lean hold

Verdict: HOLD. Luke Raley is a starter with elite power metrics trapped in a .100 slump. His BABIP will regress, but his xwOBA of .399 is elite; once the AVG corrects upward (it will), he'll be a league-winner. Don't panic-drop.

#12 SELL Ezequiel Duran

1B/2B/3B/SS/OF · TEX · 15% → 16% owned (▲ +1.0pp)

Why he's being added: Ezequiel Duran (16% owned) is the #1 LF starter with a solid-looking .263 / 10-38 line over 10 games, but his Statcast is muted: xwOBA .344, just 6.0% Barrel rate, and 46.3% HH%. His .351 BABIP is above-average, signaling his batting average is propped up by luck, not quality contact.

Stream ▓▓▓▓▓░░░░░ Hold · 45% — neutral

Verdict: SELL. Ezequiel Duran is a modest BABIP-driven add riding high luck. His underwhelming xwOBA and low Barrel rate suggest his BA will regress, dragging his value. Look elsewhere for upside.

#13 HOLD Carmen Mlodzinski

SP/RP · PIT · 15% → 16% owned (▲ +1.0pp)

Why he's being added: Carmen Mlodzinski (16% owned) is a #6 backup starter/reliever with a 9.64 ERA over 8.4 IP (2 games), which looks terrifying, but his xERA of 4.76 and elite 75.0 K% suggest real strikeout stuff being masked by bad luck. Caution flag: fastball velocity is down 1.4 mph vs. prior season—monitor for injury.

Stream ░░░░░░▓▓▓░ Hold · 60% — neutral hold

Verdict: HOLD. Carmen Mlodzinski is a speculative deep-league add with elite K rate (75.0%) backing the profile, but the velocity dip is a warning sign. Hold if you have roster space, but don't overpay; monitor for IL news.

#14 STREAM Zack Gelof

2B/OF · ATH · 4% → 5% owned (▲ +1.0pp)

Why he's being added: Zack Gelof (5% owned) slots as the #1 3B starter and has posted a .250 / 10-40 line with 2 HR over 10 games. His Statcast is unimpressive: xwOBA .315, just 7.1% Barrel rate, and 42.9% HH%. No transaction, no catalyst—just a modest performer entering waiver consciousness.

Stream ▓▓▓▓░░░░░░ Hold · 35% — clear stream

Verdict: STREAM. Zack Gelof is a depth-league add with a starting role but pedestrian Statcast metrics and no clear catalyst beyond quiet competence. Use as a plug-and-play only if you're shallow at 3B; don't target for upside.

#15 STRONG SELL Michael McGreevy

SP · STL · 26% → 27% owned (▲ +1.0pp)

Why he's being added: Michael McGreevy (27% owned) is the #3 backup starter and has posted a dazzling 0.75 ERA over 12.0 IP (2 games), winning over league owners. But his xERA of 5.08 is a blaring red flag, and his 17.0 K% + 6.0 Whiff% reveal a low-strikeout pitcher overperforming wildly. Additional concern: fastball velocity is down 1.8 mph vs. prior season.

Stream ░░▓▓▓▓▓▓░░ Hold · 20% — strong sell

Verdict: AVOID. Michael McGreevy is an ERA-overperformer riding historic luck (0.75 vs. 5.08 xERA). His velocity decline is a durability flag, and his strikeout rate is alarmingly low. The regression is imminent and severe. Do not add; look elsewhere.

Key Takeaways

Highest conviction HOLD: Waldschmidt — MLB callup, elite Statcast, clear path to ABs.
Most dangerous AVOID: McGreevy — 0.75 ERA masking a 5.08 xERA; velocity red flag incoming.