Wednesday's Fantasy Baseball Waiver Wire Adds: Jonah Tong, Giancarlo Stanton and More

It's time for our third fantasy baseball waiver wire article of the week!

We won't cover anyone who appeared in waiver stories on Monday or Tuesday, and also will skip any pitching streamers from Wednesday's article.

Check out the top fantasy baseball waiver wire options everyday on FantasySP. Join the new FantasySP Discord to keep up to date with all the recent news from FSP!

Should You Add Jonah Tong?

Tong is up 13.01% and sits at 38.01% rostered. He is getting called up to make his major league debut on Friday. Tong will make a start against the Marlins.

Tong is the No. 44 prospect in baseball and had a 2026 ETA, so he's being pushed to the big leagues. He's 22 years old, stands 6-foot-1 and weighs 180 pounds. The right-handed pitcher was a seventh-round pick of the Mets in 2022.

For scouting grades, Tong has a 65-grade fastball, 55-graded curveballs and changeups and a 45-grade slider. His control is graded as a 45 as well, and he's a 55 overall prospect.

He's pitched in parts of three minor league seasons, going 16-11 over 53 starts and 57 appearances. Tong has covered 247 2/3 innings and has a 2.54 earned run average.

Across two levels this season, Tong is 10-5 over 22 starts and 113 2/3 innings. He's got a 1.43 ERA, 179 strikeouts and 47 walks, while having a .148 average against him.

He's been stellar in the minor leagues, so why not add him as the team makes a playoff push? It's a big stage for a young prospect, but with how he's looked in the minor leagues, fantasy owners should be expecting big things from him. For that reason, you can expect his own percentage to keep rising as he nears that Friday start.

Miami isn't as good of a streaming matchup as they have been over the past couple years, or even early this season. Tong could still be at least an average fantasy pitcher if he gives up a couple runs, especially if he's striking hitters out.

Usually a pitching prospect making his MLB debut has the advantage, and that could help Tong have a really high ceiling on Friday night. I'd be in favor of adding him now and starting him on Friday - at the very least, I'm stashing him in case he looks good in his first start.

He needs to be added in all deep leagues right away. I'd also add him in a good amount of standard leagues. Tong might be near 100% rostered by the end of his first start, so don't wait too long if you want to add him.

Should You Add Giancarlo Stanton?

Stanton is up to 69% rostered - he was at 61% on August 24.

He has five hits over the team's past three games, including a pair of home runs and two doubles. Stanton has six RBIs, four runs scored, no walks and four strikeouts in that span as well.

Over 51 games and 183 plate appearances this season, Stanton has a .313 average and .388 on-base percentage. He has popped 17 home runs among his 51 hits, while also legging out six doubles. Stanton has 46 RBIs, 27 runs scored, 19 walks and 56 strikeouts.

He was likely only eligible at designated hitter when he first started playing games this season, but he should have picked up outfield eligibility in right field since he's played there as Aaron Judge just is the DH. Stanton has played 11 games in right, so check to see if he's outfield eligible now.

If he is, Stanton should be added immediately. Not only is the slugger delivering big power numbers, but he's got a high average and OBP to go along with it. He's been one of the better fantasy hitters since he got back on the field, and he deserves to be rostered in more leagues.

Add him now and you likely have a daily starter for the rest of the season. Hopefully this is the last time I have to talk about Stanton - there's a reason I keep adding him to waiver stories, it's because he's a fantastic option.

Should You Add Ryan Walker?

Walker is up 4.19% and sits at 61.99% overall.

He's back on the rise as he's regained the closer role in San Fran. Walker lost the closer role to Camilo Doval earlier in the season, and after Doval was traded, Rodriguez was the closer. Rodriguez hit the injured list, meaning Walker gets the closer role back now, and is a better fantasy asset because of it.

He's earned saves in back-to-back outings now. He allowed a hit in both appearances, but also struck out two batters in each game and didn't allow a run.

Walker has been stellar in August, allowing just two runs (one earned). He's worked 9 1/3 innings this month, giving up nine hits and one walk, but striking out 10.

He's 4-4 with 12 saves and five blown saves on the year, and he also has eight holds. Walker has worked 53 innings, allowing 25 runs (21 earned for a 3.57 ERA) on 45 hits and 14 walks. He's struck out 53 batters for some more fantasy value.

He really struggled earlier in the season, but has righted the ship and been a top-end bullpen option lately. He's worth adding in all deeper leagues if he's still available in any of those.

He could be streamed in standard leagues, although he's not a must-add guy. San Fran likely won't win enough down the stretch to support Walker in a full-time closer role. His own percentage will rise for as long as he has the job and is pitching well.

Should You Add Alejandro Kirk?

Kirk is ever so slightly trending up - he's at 57.92% at the time this article was published.

He is riding a four-game hitting streak, with five knocks over that span. Kirk has 11 hits, including four homers and a double, over his past nine games. Over that nine-game span, Kirk also has 12 RBIs, eight runs scored, a stolen base, six walks and just four strikeouts.

I'm surprised his own percentage isn't skyrocketing lately, especially after looking at his season-long numbers. He has a .297 average and .361 OBP across 106 games and 418 plate appearances. Kirk has 14 doubles and 11 homers among his 111 total hits, while also tallying 60 RBIs, 37 runs scored, a stolen base, 39 walks and 42 strikeouts.

While he's added pop of late, he's been a good option all season with a higher average and OBP. He doesn't hurt himself with negative points from a lot of strikeouts either, which is why he should have already been rostered in more leagues.

Add Kirk now in all deeper leagues and a good amount of standard leagues. He's a better fantasy hitter than you think, and a few days on your team and in your lineup would prove that to you.

Should You Add Jorge Polanco?

Polanco was added in 2.72% of leagues, bringing his overall mark to 42.99%.

He has five hits over his past three games, and has logged nine hits over his past seven contests. In that seven-game stretch, Polanco has two doubles and home runs among the hits, along with six RBIs, a stolen base, five runs scored, two walks and six strikeouts.

The primary designated hitter is also eligible at second base, and maybe third base too. See where he's eligible to start for you.

He's been up and down as a fantasy asset this season, but has looked good of late and is worthy of deep-league fantasy action. He's not a must-add in all those leagues, but could sit at 40% or more the remainder of the season.

He has a .252 average and .317 OBP over 111 games and 415 plate appearances this season. Polanco has 16 doubles and 20 homers among his 94 total hits, while also having 59 RBIs, 49 runs scored, six stolen bases, 34 walks and 65 strikeouts.

His fantasy ceiling is capped a bit, and I think he's a better deep leaguer, unless he's red hot at the plate. He's not at that point right now, and I think there's better options available to you in standard leagues.

He could be a solid deep-league asset the rest of the season, so if you need help at second base, or in the infield, give him some consideration.