LaRossa begins his first season with the Ducks and sixth in professional baseball. The right-hander spent the past two seasons with the Missoula PaddleHeads of the Pioneer League. He combined to make 49 appearances, striking out 75 batters over 55.1 innings of work. The North Massapequa native made 24 appearances with High-A Wisconsin in the Milwaukee Brewers organization in 2012, striking out 41 batters in 34.2 innings.

The 29-year-old began his career in 2018 with the Rockland Boulders of the Frontier League. The following season, he combined to make 25 appearances (one start) with Florence (Frontier League) and Vallejo (Pacific Association). The righty recorded one save and struck out 34 batters over 36.1 innings. Prior to his professional career, he played his high school baseball at St. Dominic High School in Oyster Bay, N.Y., and his collegiate baseball at the University of Hartford.