Marcelo Mayer, the Boston Red Sox's highly touted prospect, has made his MLB debut, showcasing promising talent in his first few games. The 22-year-old, ranked No. 8 on MLB's top prospects list, demonstrated his capability with notable hits and an impressive OPS. However, his groundball tendencies and struggles with non-fastball pitches may challenge his consistency against major league pitchers.

Denzel Clarke debuted with the Oakland Athletics but faced early struggles, managing only one hit in 19 at-bats. Known for his size and speed, Clarke's high strikeout rate poses concerns, highlighting the need for adjustment at the major league level. Meanwhile, Robert Hassell III of the Washington Nationals has shown flashes of potential since his promotion, including a three-hit game and his first home run. With a solid batting average in Triple-A prior to his call-up, he could be a key player as the Nationals rebuild post-Juan Soto trade.