Christian Koss is slashing .471 with a .512 wOBA over the last seven days while cutting his strikeout rate from 24.8% to 10.0% — and he's rostered in just 5% of leagues. That's the kind of disconnect that wins waiver periods. Here's everything that matters this Tuesday morning.

Today's Top Adds

Christian Koss (2B/3B/SS, SF) — 5% Rostered

This is the grab of the morning. Koss has posted a .512 wOBA over the past week against a .329 mark over 30 days, and the underlying process backs it up: his strikeout rate has cratered from 24.8% to 10.0% while his walk rate has surged from 6.9% to 15.0%. That's not a fluke hot streak — that's a hitter who's made a mechanical or approach adjustment and is now controlling the zone. Twenty plate appearances across five games is a solid enough sample to act on, and multi-position eligibility (2B/3B/SS) makes him a roster construction dream. Ownership jumped 5% in the last seven days and is accelerating. The window to add him for free is closing fast.

Dominic Canzone (OF, SEA) — 23% Rostered

Canzone's week — .296 AVG, .354 wOBA, 93.0 mph average exit velocity, 51.4% hard-hit rate — is exactly the kind of steady, quality-contact profile that translates beyond small samples. His 7-day wOBA of .354 is up from .325 over 30 days, and the 27 plate appearances across five games confirm consistent playing time. He's already at 23% ownership, so he may be gone in competitive leagues, but if he's sitting on your wire, the exit velocity and hard-hit data say the production is real.

Watch List

Jeff Hoffman (RP, MIN) — 50% Rostered

A 55.6% strikeout rate over the last seven days, up from 37.5% over 30 days, with a 0.51 FIP and a 16.67 K/9. He's already half-rostered, so this is more of a "if he's somehow still available, don't wait" situation. The K-rate spike is enormous.

Danny Jansen (C, TEX) — 0% Rostered

A .508 wOBA with a .417 average, a homer, and a strikeout rate drop from 23.9% to 14.3% — and nobody owns him. The 54.2% hard-hit rate adds credibility. Early signal territory at five games, but the catcher position is so barren that this deserves immediate monitoring. If he gets one more strong series, he'll be a must-add.

Josue De Paula (OF, LAD) — 17% Rostered

Only three games, so pump the brakes, but the quality indicators are screaming: 61.1% hard-hit rate, 94.0 mph exit velocity, .545 wOBA. A Dodger outfielder hitting the ball that hard warrants a roster stash in deeper formats. Watch for continued playing time.

Ryan Watson (RP, LAA) — 0% Rostered

A 0.10 FIP and 42.9% K-rate over the past week, up from 30.8% over 30 days. That 13.5 K/9 is filthy. Completely unowned and worth a speculative add in leagues that reward ratio relief.

Pedro Ramírez (2B/3B, CHC) — 6% Rostered

Two homers in the last week with a .383 wOBA, 90.5 mph exit velocity, and a strikeout rate that's been halved from 17.7% to 9.5%. The 21 plate appearances confirm he's getting regular at-bats. The power-plus-contact combination at this ownership level is intriguing, but the .250 average tempers the excitement slightly. One more week of this and he's an add.

Eduardo Valencia (C/1B, DET) — 2% Rostered

A zero-percent strikeout rate over the last seven days — yes, zero — with a .457 wOBA, .444 average, and a walk rate that jumped from 2.0% to 10.0%. The 90.3 mph exit velocity provides some hard-contact support. This is obviously unsustainable, but when a catcher-eligible bat is this locked in and this cheap, it's worth a look.

Elvis Alvarado (RP, ATH) — 9% Rostered

Clean 0.00 ERA with a 1.10 FIP and 9.0 K/9 over the past week. The K-rate uptick from 21.6% to 25.0% is modest compared to other arms on this list, but the FIP suggests he's limiting damage efficiently. A deeper-league hold for now.

Tyler Stephenson (C, CIN) — 14% Rostered

His ownership is actually cooling off (down 2% in seven days), but the data says the market is wrong. Strikeout rate has been slashed from 34.0% to 15.8%, walk rate up from 11.3% to 15.8%, and his 92.6 mph exit velocity with a 44.4% hard-hit rate suggests the .267 average should climb. A buy-low at the thinnest position in fantasy.

Stream of the Day

No streaming-specific signals emerged in today's scan — no spot starters or matchup-driven plays triggered our thresholds. If you need a short-term plug, the best pivot is Ryan Watson from the Watch List: that 0.10 FIP and 13.5 K/9 could stabilize your ratios for the week even in a relief role. Check back tomorrow for updated streaming recommendations.

Ownership Movers

  • Christian Koss (5%, +5% 7d): The fastest riser on the board, and completely justified. A .512 wOBA with elite plate discipline improvements at 5% ownership is the definition of market inefficiency. This number will be 20%+ by next week.
  • Dominic Canzone (23%, +1% 7d): Stable ownership despite strong production. The 93.0 mph exit velocity and 51.4% hard-hit rate suggest the market is underreacting. Ownership should climb faster than this.
  • Jeff Hoffman (50%, stable): Already widely rostered, but the 55.6% K-rate explosion means he should be closer to 70-80% in standard formats. If you're in a league where he's available, the window is gone tomorrow.
  • Danny Jansen (0%, stable): The most glaring disconnect on this list. A .508 wOBA from a catcher at literally zero ownership. The market hasn't caught up yet.
  • Josue De Paula (17%, stable): Flat ownership despite a .545 wOBA and elite exit velocity. The three-game sample is holding people back, which is fair — but those who wait for a larger sample will pay more to acquire him.

Quick Hits

  • Best plate discipline improvement of the day: Eduardo Valencia's strikeout rate went from 26.0% over 30 days to 0.0% over seven days. That won't hold, but the direction matters more than the destination — a catcher who stops chasing is a catcher about to produce.
  • Hardest-hit ball among today's signals: Josue De Paula at 94.0 mph average exit velocity with a 61.1% hard-hit rate. Those are elite-tier contact quality numbers regardless of sample.
  • Tyler Stephenson's strikeout rate cut from 34.0% to 15.8% is the second-largest K-rate decline on today's board. He's the rare player whose ownership is falling while his underlying metrics are improving — a classic buy-low at catcher.
  • Relief pitching depth is showing up today: Three relievers on the Watch List — Hoffman, Watson, and Alvarado — all posted 0.00 ERAs with strong FIPs. If your league rewards holds or you need ratio stabilizers, this is the week to mine the wire for arms.
  • Catcher is the position to attack right now. Three catchers — Jansen, Valencia, and Stephenson — are all flashing buy signals simultaneously. If you've been streaming the position, lock one in now before the broader market notices.