Hidden Gems by Position: Under-Owned Targets for the Week of June 21
Every name below is a real free agent or low-owned player, ranked by our Hidden Gems engine on three axes: underlying skill (Statcast), opportunity (playing time and role), and recent form. Ownership figures are Yahoo, as of June 21, 2026. Where all three players at a position carry 100-plus plate appearances, we add a Player Lab chart of their rolling 10-game xwOBA so you can see who is actually trending up, not just who has the prettiest season line.
Catcher
Catcher is the hardest position to stream, which is what makes a 2% owned bat like Endy Rodriguez worth a look. His .368 xwOBA and 13.6% barrel rate support a .976 OPS over the last 14 days, and he is starting nearly every day in Pittsburgh. If the ownership scares you, Gabriel Moreno (46%, .363 xwOBA) is the steadier profile and has been scorching at 1.151 OPS across his last 14, while Samuel Basallo (49%) brings the loudest raw contact of the group at 11.9% barrels.
First Base
A deep position this week. TJ Rumfield (COL, 24%) is locked into everyday at-bats and riding a 1.115 OPS over his last 14 with ownership climbing fast. Paul Goldschmidt (NYY, 37%) is on a vintage run, his .353 xwOBA the best skill mark of the trio, and Jake Burger (TEX, 24%) pairs a 45.6% hard-hit rate with a 1.097 L14 OPS. The rolling chart shows how Goldschmidt and Burger have surged into June after slower starts.
Rolling 10-game xwOBA, PA-weighted, season to date. Compare these three live in the Player Lab.
Second Base
Nasim Nunez (WSH, 17%) is the contact-and-speed play, hitting .406 with a 1.066 OPS over his last 14 while locked into the everyday job, though his .275 xwOBA says lean on him for average and steals rather than power. Bryson Stott (PHI, 44%) and Matt McLain (CIN, 46%) are the higher-owned, higher-floor options; McLain owns the best xwOBA of the three at .327.
Rolling 10-game xwOBA, PA-weighted, season to date. Compare these three live in the Player Lab.
Third Base
Royce Lewis (MIN, 47%) is back to mashing with a 12.5% barrel rate and a .944 L14 OPS, the priority add if he is sitting on your wire. Blaze Alexander (BAL, 12%) is the deeper sleeper, a .353 xwOBA and 47% hard-hit rate behind a blistering .438 average over the last 14. Denzer Guzman (LAA, 1%) is the lottery ticket, a recent call-up who posted a .974 OPS with 12 homers at Triple-A and is now getting everyday run.
Shortstop
Anthony Volpe (NYY, 6%) is the headliner, somehow sitting at single-digit ownership while running a .916 OPS over his last 14 in an everyday role. Xander Bogaerts (SD, 39%) and Masyn Winn (STL, 34%) are the rebound buys; Winn in particular has spiked late, as the rolling chart shows his xwOBA climbing back toward .400 into June.
Rolling 10-game xwOBA, PA-weighted, season to date. Compare these three live in the Player Lab.
Outfield
Five names worth rostering. Sam Antonacci (CWS, 26%) leads with an elite .382 xwOBA and a 1.126 L14 OPS. Garrett Mitchell (MIL, 6%) and Cam Smith (HOU, 11%) are the power sleepers at 14.3% and 12.3% barrel rates, Henry Bolte (OAK, 10%) brings a 52% hard-hit rate, and Cole Carrigg (COL, 16%) carries a .943 Triple-A OPS into regular playing time. We held the Lab chart here since the five-man group includes two recent call-ups under 100 plate appearances.
DH / Utility
If you need a UT bat, Dominic Canzone (SEA, 28%) checks every box: an elite .383 xwOBA, a 15.3% barrel rate, and a 1.017 OPS over his last 14. Josh Bell (MIN, 13%) is the quiet value, raking at a 1.081 L14 OPS, while Bryce Eldridge (SF, 48%) offers the loudest power profile at a 54.9% hard-hit rate and a .384 xwOBA.
Rolling 10-game xwOBA, PA-weighted, season to date. Compare these three live in the Player Lab.
Starting Pitchers
Stephen Kolek (KC, 41%) leads the streamers with a 2.68 ERA and a 0.73 mark over his last two starts; his 3.45 xERA says the skills back it. Brandon Young (BAL, 27%) is trending up, and Martin Perez (ATL, 37%) pairs a 2.78 ERA with the best strikeout rate of the group at 20.2%.
Picks generated by the Kodo Hidden Gems engine. Every stat traces to a real game log or Statcast row. Ownership is Yahoo as of June 21, 2026. Build your own rolling comparisons anytime in the Player Lab.