As we enter the home stretch of the fantasy baseball season, every roster decision carries championship weight. Whether you're making a late surge to climb the rotisserie standings or navigating the win-or-go-home pressure of head-to-head playoffs, identifying shifting momentum is critical. In this week’s Fantasy Baseball Stock Watch, we highlight the players making game-changing impacts when it matters most, while also addressing cold streaks and workload fatigue from established names that could sink your title hopes. 

Fantasy Baseball Stock Watch Risers This Week

Henry Bolte, OF Athletics

The Athletics have a good one in Henry Bolte, and he’s been awesome over the last two weeks. He’s been homering, he’s been stealing bases, and he’s always on base. He has had a .308/.419/.577 with four home runs and five steals over that span. Bolte is still widely available down the stretch run of the season, and a majority of his games left are being played at home, and Sutter Health Park is the best offensive park in the sport. 

Coby Mayo, 1B, 3B Baltimore Orioles

Over the last two weeks, there are only four players with more home runs than Coby Mayo. Mayo is out there with bad intentions every time he steps up to the dish. He’s absolutely mashed left-handed pitching and struggled against righties, but he hit his latest home run off of a right-handed hurler, so it’s definitely progress. Mayo plays a brutal third base position, and if you’re trying to catch up in home run categories, he’s a good add for the remainder of the season as the Orioles give him every day at-bats.

Freddy Peralta, SP Tampa Bay Rays

Since August 26th, Freddy Peralta has fired off three quality starts in which he’s allowed one earned run or fewer. Peralta has pitched better for the Rays, but it’s come at a cost: strikeouts. He’s notched just a 6.6 K/9 and 18.7% K-rate since the trade to Tampa Bay. There are only five pitchers with three quality starts over the last 15 days, and Peralta is one of them. If Peralta has been dropped in your fantasy league, add him as quickly as you can with two home starts upcoming.

Cal Quantrill, SP Texas Rangers

I finally gave in and believed in what Cal Quantrill is doing, and I can’t believe we’re here. I never thought I’d be on this side of the aisle, but it’s good to be here. Quantrill has rattled off five consecutive quality starts and hasn’t allowed more than three earned runs in any outing since July 22nd. He, like Peralta above him, is one of five pitchers with three quality starts over the last 15 days.

 

 

 

Fantasy Baseball Stock Watch Fallers This Week

Dillon Dingler, C Detroit Tigers

It has been a dreadful period of time for Dillon Dingler, who can’t do anything right at the plate right now. Over the last 15 days, Dillon Dingler is 7-for-43 (.163 AVG) with one run scored, three more driven in, and zero home runs. He hit just .173 with three home runs in 27 August games and has followed that up with some bad September baseball as well. It’s crunch time, and if you can find a catcher available on your waiver wire, thank Dingler for all he’s done for your roster, but you don’t really have the time to see if he’s going to break out of it or not.

Matt Olson, 1B Atlanta Braves

This is probably the worst stretch of baseball Matt Olson has played all season long, and it comes at the worst possible time for fantasy owners. Over the past two weeks, Olson has gone 8-for-54 (.148 AVG) and has one measly home run and four runs batted in. The power has been sapped for a little while now as he’s only homered once since August 17th, which is a long period of time for a guy with 37 bombs on the year. The 31.3% K-rate in August is higher than it’s been in any other month this year, too.

Eury Perez, SP Miami Marlins

We’ve now seen Eury Perez lit up for three consecutive starts and fail to complete five innings in any of them. 16 earned runs in 11.2 IP for a guy with an ERA still under 4.00- that’s how good he was up to this point in the year! There’s nothing really substantial under the hood that leads you to believe he’s simply not a good pitcher anymore other than the fact that he’s walking too many batters and has had some bad luck with batted balls. He’s also now up over 142 innings between the majors and minors this year, which is a career-high, so that could be factoring into the lack of control recently. We’ll see how the Marlins handle him down the stretch.

Kyle Harrison, SP Milwaukee Brewers

The Brewers manager Pat Murphy outwardly said that he’s going to give Kyle Harrison another chance to figure things out as a starter, and if he can’t, he’s moving to the bullpen. Harrison hasn’t gotten out of the fourth inning in either of his last two starts while allowing 19 total hits and 13 runs, and has a 7:6 K:BB ratio. Other than 2024, this is the only time as a professional that Harrison has topped 100 innings, and that could be taking a toll on his arm, an arm that has dealt with some innings back in July.