We are a month into the 2025 season and can finally start making lineup changes based on the in-season performances of MLB players. I'll provide players who are less than 50 percent owned in Yahoo leagues and could significantly contribute to your team.
Last week, I recommended Colin Rea (Cubs), Emilio Pagán (Reds), Andy Pages (Dodgers), and Ty France (Twins).
May's top Fantasy Baseball waiver wire additions
Brayan Bello (SP - Boston Red Sox)
Somehow, Bello is only 42 percent owned. The righty has been hot since returning from the injured list. He's thrown 22 1/3 innings, allowing only five earned runs for a 2.01 ERA. As good as the 25-year-old has been, he's struggled with the long ball and walks.
All five runs he's allowed have come from three home runs. Bello has struck out 13 batters, but has walked 14 hitters, as well. Regardless of Bello's struggles, fantasy managers must add him to all formats. His next start will be May 13 against the Detroit Tigers, and his spot in a good Red Sox rotation is secured.
Josh Smith (3B, SS, OF - Texas Rangers)
Smith is an interesting player for fantasy purposes. He's made a few starts at first base, so he'll soon be eligible at another position. With Marcus Semien's struggles, Smith has found himself in the leadoff spot in the Rangers' lineup. The 27-year-old has a 150 wRC+ and a .871 OPS.
Smith won't help in the home run category for fantasy baseball, as he's only hit three all season, but he's scored 16 runs and driven in nine. The utility player has four stolen bases, as well. His playing style is to get on base and let Wyatt Langford, Corey Seager, and Adolis García knock him in.
Smith is a watchlist player for fantasy managers since he won't contribute in every category. However, he's shown the capability to get on base, which is vital with the bats he has behind him.
Plus, his position eligibilities allow you to slot him in nearly every position when players have off days. If you do need him, only pick him up in standard formats. He's not productive enough to use multiple years in dynasty formats.
TJ Friedl (OF - Cincinnati Reds)
Like Smith, Friedl might not contribute all that much to the home run category, although he's hit 18 and 13 (in only 83 games), respectively, in the last two seasons. This season, he's contributed in every other category, scoring 20 runs, knocking in 15, and stealing eight bases.
The outfielder has a career high of 27 stolen bases (2023), so it's optimistic that he could reach that number again. If you need an outfielder, then Friedl is a good option to pick up in standard formats. I'd hold off adding him to dynasty or multi-year formats, as he only has one season where he's played in over 90 games.
Michael Wacha (SP - Kansas City Royals)
Wacha has been a durable pitcher over his 13-year career. He's pitched over 120 innings in eight of his past 10 seasons. He's thrown 45 1/3 innings this season but has lacked run support, as he only has a 2-4 record despite a 2.98 ERA. The 33-year-old received only four or more runs of support in two of his eight games.
So, don't let his record deceive you. The righty stays around the zone, as he's only walked 14 hitters in eight starts and struck out 34. Wacha should be added in all formats as he should receive two starts next week against the Houston Astros and St. Louis Cardinals.