Sermo comes to Long Island after most recently playing in 2022 with the Siatama Musashi Heat Bears of Japan. Previously, he played with the Sioux City Explorers of the American Association in 2021. He appeared in 91 games, posting a .298 batting average with a career-high 29 home runs, 86 RBIs, 78 runs, 93 hits, 20 doubles, three triples, 88 walks, 18 stolen bases and a .455 on-base percentage. The 31-year-old was named the American Association Most Valuable Player in 2018 after leading the league in RBIs (81) and slugging percentage (.627), tying for second in home runs (22) and tying for third in runs scored (75) with Sioux City.

The Puerto Rico native began his career in the Milwaukee Brewers organization, spending three seasons with the club and reaching as high as Double-A. He then spent parts of two seasons (2016-17) in the Boston Red Sox system at High-A Salem. The switch-hitter has hit 10 or more home runs in a season four times in his career and has driven in 75 or more runs on three occasions. He briefly appeared in the Atlantic League with the Somerset Patriots in 2018, playing six games. Sermo was originally selected by the Brewers in the 35th round of the 2012 amateur draft.