According to Ryan Divish, the Seattle Mariners are set to promote top infield prospect Colt Emerson to the major leagues. Emerson is currently MLB.com's No. 7 overall prospect and the team's No. 1-ranked prospect. Emerson joined the Mariners with the 22nd overall pick in the 2023 MLB draft and is set to make his MLB debut in the immediate future. Emerson has enjoyed a strong start to the Triple-A campaign, which prompted the early promotion. Through his first 38 games with Tacoma this summer, Emerson has posted a strong .255/.347/.469 slash line with eight doubles, seven home runs, and 10 stolen bases. Since May 1, Emerson has seen his production take a slight uptick, posting a .288 AVG and .840 OPS. Fantasy managers should pay close attention to his usage, as he could become the primary third baseman in the short term, as Brendan Donovan has been dealing with a lingering injury. Given his five-category skill set, he should be considered a must-add across all formats.

New York Mets starting pitcher Christian Scott opened 2026 in Triple-A after missing the entire 2025 season while recovering from elbow surgery. However, Scott rejoined the Mets rotation in late April and has been solid across 15 2/3 innings (four starts), pitching to a 3.45 ERA and 1.40 WHIP with 20 strikeouts. While Scott has struggled to work deep into games, he's logged 19 strikeouts over his last three appearances and is averaging 96 miles per hour on his fastball. As he gets more innings post-surgery under his belt, Scott's current walk rate of 12.9% should start to regress closer to the 6.1% walk rate he posted across 47 1/3 innings after making his MLB debut in 2024. Scott is currently slated for two manageable road starts against the Washington Nationals and Miami Marlins in the upcoming week and profiles as a solid streaming option with upside for fantasy managers to target on the waiver wire.

Since making his MLB debut on April 15, Chicago White Sox outfielder Sam Antonacci has proven he's ready for the big leagues. Across 106 plate appearances entering play on Sunday, the 23-year-old was hitting .284/.385/.420 with one home run, nine RBI, 16 runs scored, and three stolen bases. Antonacci's plate skills were one of his calling cards as a prospect, and he's struck out in just 12.3% of his MLB plate appearances so far. While he's just three for his first six as a base stealer with the White Sox, Antonacci swiped 48 bags in the minors in 2025 and should get to more speed in the big leagues over the course of the year. His 10.3% barrel rate also hints at some untapped power upside, although fantasy managers shouldn't expect more than 10 to 15 long balls at the most. Even still, Antonacci offers a well-rounded skill set and has emerged as the everyday leadoff hitter for an improving White Sox lineup. In fantasy leagues where he's not already rostered, Antonacci is worth targeting on the waiver wire.

Since being called up to the big leagues in early May, San Francisco Giants first baseman Bryce Eldridge has struggled to an .083/.185/.208 slash line with one home run, one RBI, and one run scored across 27 plate appearances. Eldridge has struck out in 33.3% of his plate appearances, a recurring issue for him after he struck out in 35.1% of his plate appearances after making his MLB debut in 2025. However, the 21-year-old is considered one of the top hitting prospects in the Giants system and has still only logged 64 career plate appearances at the MLB level. Eldridge got off to an excellent start at Triple-A Sacramento before earning the call, hitting .333/.445/.518 with five home runs and 22 RBI across 137 plate appearances. In deeper leagues, Eldridge could be a worthy high-upside, buy-low candidate for fantasy managers to target on the waiver wire.