Delaplane begins his first season with the Ducks and sixth in professional baseball. The pitcher comes to Long Island after pitching three seasons in the Seattle Mariners organization (2017-19) and two in the San Francisco Giants system (2022-23). He made 136 appearances during those five seasons, compiling a 17-10 record with a 2.91 ERA, 18 saves and 348 strikeouts to 97 walks over 210.2 innings. The San Jose native pitched in 32 games across Low-A, High-A and Double-A in 2023, going 5-4 with a 4.14 ERA, one save and 67 strikeouts in 45.2 innings.

The 29-year-old was named an MiLB.com Organization All-Star in 2019 with the Mariners. Between High-A and Double-A, he combined to post a 6-3 record with a 2.23 ERA, seven saves and 120 strikeouts to just 23 walks in 46 appearances. For his efforts, he was also named a California League Mid-Season All-Star. Prior to playing professional baseball, the righty spent four seasons at Eastern Michigan University. Delaplane was originally selected by the Mariners in the 23rd round of the 2017 amateur draft.