Tampa Bay Rays outfield prospect Chandler Simpson stole his first base at the MLB level during Sunday's loss to the New York Yankees. Simpson would get on base via a forceout in the eighth inning and then proceed to swipe second base. After batting in the leadoff spot during his MLB debut on Saturday, Simpson was pushed down to the nine-hole on Sunday. However, on Sunday, the Rays were facing Yankee southpaw Max Fried. Fantasy managers should continue to monitor Simpson's status as the Rays may either limit his role or keep him on the bench when facing left-handed pitchers. However, against righties, Simpson could become the top option to lead off. Last summer in the minor leagues, Simpson flashed elite speed as he swiped 104 bases across 110 contests. Fantasy managers should view the 24-year-old as a top option for speed in category formats. However, he does not carry any power upside.

Milwaukee Brewers pitching prospect Logan Henderson tossed six innings of one-run ball in his MLB debut on Sunday afternoon. In this outing against the Athletics, Henderson allowed just three hits, one walk, and struck out nine batters, en route to picking up the victory. This was an impressive debut for the 23-year-old. His lone blemish came in the fifth inning when Seth Brown hit a solo blast. Henderson was given the call to the big leagues due to the numerous injuries in the Milwaukee rotation. Earlier in the season, he logged 14 innings at Triple-A to the tune of a 3.21 ERA and a 1.36 WHIP. During this stint, he tallied 24 punchouts with just 10 walks. Given his impressive debut, fantasy managers should expect the former fourth-round pick to earn at least another turn in the rotation. He is worth adding in all 12-team formats.

Washington Nationals infield prospect Brady House has begun to heat up at Triple-A. On Saturday, House tallied four hits, including two home runs. Then on Sunday, he extended his current hitting streak to three games. Since holding a solid .269/.333/.423 line with just three doubles and one home run during the first 14 games of the Triple-A regular season, House has held a strong .368/.429/.684 slash line over his previous five contests. Last summer, the former 11th overall selection spent time with Double-A before earning a promotion to Triple-A. Across his first taste of Triple-A action last season, House held a .250/.280/.375 line. This is a great sign to see House begin to find his power swing at the Triple-A level. If he continues to hit for power, he could be in the mix for an early-season MLB debut.

Boston Red Sox infield prospect Marcelo Mayer went 2-for-5 with a home run during their contest on Sunday against Triple-A Rochester. This was Mayer's third-straight contest tallying at least two hits and fourth-straight game tallying at least one hit. This was also Mayer's second long ball over his previous three contests. Over his last six contests, Mayer has begun to heat up at the plate, holding a .286/.333/.536 line with eight total hits (three for extra bases) and added 13 RBI. The 22-year-old spent most of his 2024 campaign with Double-A before earning the call to Triple-A Worcester. However, he could not appear in a contest due to hip and back injuries. However, the former fourth overall pick has begun to hit for power at Triple-A and is nearing his MLB debut. He should be in the mix to get the call to Boston in the coming months.

Colorado Rockies outfield prospect Zac Veen went 1-for-2 with a home run during Game 1 of the doubleheader against the Washington Nationals on Sunday afternoon. Veen would hit his first MLB long ball in the third inning off Washington starting pitcher Jake Irvin. Veen was in contention to make the MLB roster out of camp but fell short in the running. However, he was rewarded with an early promotion and made his MLB debut on April 8. However, the former ninth overall pick has been going through some growing pains in the big leagues as he has posted a modest .118/.189/.235 slash line with just two extra-base hits across his first 11 MLB contests. Last season in the minor leagues, he held an overall .258/.346/.459 line. Fantasy managers should expect the Spruce Creek HS product to continue to see playing time in center and left field.