Dynasty Baseball Stock Watch: Franklin Arias, Joseph Dzierwa, Theo Gillen rising quickly

It’s still extremely early, and the sample sizes we’re analyzing and dissecting in the lower minors barely qualify as meaningful. However, that doesn’t mean everything should be dismissed as noise. A handful of early-season performances have stood out, not just for the on-field results, but for the broader developmental changes they may be signaling.

This week’s Rotoworld Dynasty Stock Watch examines 12 prospects on the rise with varying trajectories and timelines to the big leagues that fantasy managers should be prioritizing in trade discussions and on waiver wires. ⚾ Baseball is back! MLB returns to  NBC and Peacock in 2026 !

In addition to becoming the exclusive home of Sunday Night Baseball, NBC Sports will broadcast MLB Sunday Leadoff, “Opening Day” and Labor Day primetime games, the first round of the MLB Draft, the entire Wild Card round of the postseason, and much more. RELATED:  Check out this week’s MLB Power Rankings! Franklin Arias, SS, Red Sox There are hot starts, then there's the heater Arias is on as the fourth-youngest position player at the Double-A level this season behind only Jesús Made , Leo De Vries and Ethan Salas .

The 20-year-old shortstop has been a known commodity in dynasty formats for a couple of years, but he’s opened the 2026 campaign as arguably the hottest hitters in the entire minors, batting . 588 (10-for-17) with two doubles, two walks and just two strikeouts through six games for Double-A Portland. He boasts some of the best bat-to-ball skills in the minors, evidenced by a minuscule 10.