Landen Roupp is the hottest arm on the wire right now — a 0.82 ERA and 10.64 K/9 over the last seven days with a 2.65 FIP backing it up — and at 48% ownership after a 28-point surge, the window to grab him is closing by the hour. If you need pitching, stop reading and go add him.

Today's Top Adds

Landen Roupp (SP, SF) — 48% Rostered

Roupp's strikeout rate has jumped to 31.7% over the past week, up from an already-strong 27.8% over 30 days, and he's thrown 11.0 innings in that stretch — a full starter's workload with no short leash. The FIP sits at 2.65, confirming the ERA isn't smoke and mirrors. Ownership has spiked 28 percentage points in seven days. This is still an early signal at five games, but the stuff is loud enough that waiting for more data means watching someone else in your league roster him first.

Carmen Mlodzinski (SP/RP, PIT) — 26% Rostered

Mlodzinski is generating quiet buzz with a 2.13 FIP and a 25.0% strikeout rate over the last week, logging 10.3 innings across seven days — workload that suggests Pittsburgh is trusting him with length. Ownership has climbed 20 points in a week, and at 26% he's still widely available in most formats. The dual eligibility adds flexibility. The underlying metrics are cleaner than Roupp's ownership surge would suggest — this is a legitimate rotation piece, not a speculative flier.

Carter Jensen (C, KC) — 34% Rostered

The catcher position is a wasteland, which makes Jensen's last seven days all the more valuable: a .333 average, .428 wOBA, 93.4 mph exit velocity, and a 42.5% hard-hit rate with 26 plate appearances of consistent playing time. His strikeout rate has plummeted from 29.1% over 30 days to 23.1% over the last week, while his walk rate has climbed to 15.4%. Ownership has actually dipped 2 points — the market is sleeping on a catcher making elite-level contact adjustments. Buy low now.

Watch List

Dominic Canzone (OF, SEA) — 5% Rostered

A .503 wOBA in the last seven days is eye-popping, fueled by a .412 average, 95.0 mph exit velocity, and 50.0% hard-hit rate. At just 5% ownership, there's zero urgency from the market. If the exit velocity holds above 94 through another week, he becomes an Add Now.

Adrian Morejon (RP, SD) — 9% Rostered

Morejon's seven-day strikeout rate has doubled — 46.2% versus 23.1% over 30 days — with a pristine 0.85 FIP, a 0.00 ERA, and 13.5 K/9. That K-rate spike is absurd and almost certainly unsustainable, but the underlying stuff change could be real. Monitor his next two outings closely.

Tyler Kinley (RP, ATL) — 2% Rostered

A 36.4% strikeout rate over the last week (up from 25.0% over 30 days), a 0.00 ERA, 12.0 K/9, and a 1.43 FIP — all at 2% ownership. The early signal caveat applies, but Atlanta's bullpen role clarity could make Kinley a saves-adjacent asset quickly.

José Alvarado (RP, PHI) — 3% Rostered

The 3.91 ERA looks ugly, but the 1.80 FIP and 11.74 K/9 scream regression toward something much better. His K-rate has ticked up to 25.0% over the last week. Philadelphia's late-inning mix gives Alvarado a path to high-leverage usage if the results catch up to the peripherals.

Luis Rengifo (2B/3B/OF, MIL) — 1% Rostered

Rengifo's strikeout rate has collapsed to 5.0% over the past week (down from 14.9% over 30 days), with a .361 wOBA and 20 plate appearances of steady playing time. The multi-position eligibility at 1% ownership makes him a zero-risk depth add. Watch for the power to arrive — 90.4 mph EV and 47.9% hard-hit rate suggest it could.

Mark Vientos (1B/3B, NYM) — 7% Rostered

The raw average (.250) doesn't jump off the page, but the underlying quality is elite: 99.2 mph exit velocity, 80.6% hard-hit rate, and a strikeout rate that's cratered from 20.0% to 7.7% over the last week. That hard-hit number is absurd. Vientos is squaring the ball up at a top-of-the-league level, and the results are coming.

Willi Castro (2B/3B/OF, COL) — 14% Rostered

A .400 average and .418 wOBA over the last week with a 55.6% hard-hit rate and 94.3 mph exit velocity. His strikeout rate has been cut in half — 18.2% versus 37.0% over 30 days. The Coors factor makes it hard to fully trust, but the contact quality improvement is tangible. Ownership has actually dropped 4 points — a buying opportunity if the approach change sticks.

Stream of the Day

No streaming-specific signals were detected today, so there's no matchup-based one-start play to highlight. Instead, if you need a spot start this week, Carmen Mlodzinski doubles as a streaming option given his 2.13 FIP, 10.3 innings of workload over the past week, and the fact that he's still sitting at 26% ownership. He's the closest thing to a streaming play with real hold-worthy upside.

Ownership Movers

Landen Roupp leads all ownership gainers at +28% over seven days (now 48%), and the move is completely justified — a 0.82 ERA with a 2.65 FIP and 31.7% K-rate is not a mirage. He'll be 60%+ by next week.

Carmen Mlodzinski is the second-biggest mover at +20% (now 26%). The 2.13 FIP makes this surge rational. If anything, 26% still undervalues what he's shown.

Notably absent from the movers list: Dominic Canzone at 5%, José Alvarado at 3%, and Tyler Kinley at 2% have shown zero ownership movement despite strong underlying signals. These are the market inefficiencies you should be exploiting before the algorithms catch up.

Quick Hits

  • Mark Vientos's 80.6% hard-hit rate is the highest number on today's entire board. At 7% ownership with a 99.2 mph exit velocity, he's the most underowned player relative to his contact quality by a mile.
  • Adrian Morejon's K-rate doubled in one week — from 23.1% to 46.2%. Whether that's a stuff tick-up or a small-sample mirage, it's the single largest week-over-week K-rate jump in today's signals.
  • Carter Jensen is one of only three players on this list showing simultaneous improvement in both strikeout rate (declining) and walk rate (rising) — the hallmark of a real approach change, not just a hot streak.
  • Willi Castro cut his strikeout rate in half (37.0% to 18.2%) while posting a 55.6% hard-hit rate. Coors or not, that's a different hitter than the one who started the month.
  • The bullpen watch: Tyler Kinley (1.43 FIP), José Alvarado (1.80 FIP), and Adrian Morejon (0.85 FIP) are three sub-2.00 FIP relievers all sitting below 10% ownership. At least one of them will be a top-50 reliever by June.